Vídeos stock livres de direitos de Quadro negro

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4k00:07Hand Holding Chalk and Writing Complex and Sophisticated Mathematical Formula/ Equation on the Blackboard. Shot on RED EPIC-W 8K Helium Cinema Camera.
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Hand Holding Chalk and Writing Complex and Sophisticated Mathematical Formula/ Equation on the Blackboard. Shot on RED EPIC-W 8K Helium Cinema Camera.
4k00:14Brilliant Young Mathematician Approaches Blackboard and Finishes Solving Long and Complex Equation. Shot on RED EPIC-W 8K Helium Cinema Camera.
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Brilliant Young Mathematician Approaches Blackboard and Finishes Solving Long and Complex Equation. Shot on RED EPIC-W 8K Helium Cinema Camera.
4k00:10Concepts on blackboard at school. Young people, students and pupils in classroom. Smart hispanic girl writing math formula on board during lesson. Portrait of female child smiling, looking at camera
Concepts on blackboard at school. Young people, students and pupils in classroom. Smart hispanic girl writing math formula on board during lesson. Portrait of female child smiling, looking at camera
4k00:16Time-Lapse of the Brilliant Young Mathematician Writes Complex Equation on the Blackboard. Shot on RED EPIC-W 8K Helium Cinema Camera.
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Time-Lapse of the Brilliant Young Mathematician Writes Complex Equation on the Blackboard. Shot on RED EPIC-W 8K Helium Cinema Camera.
4k00:15Concepts on blackboard at school. Young people, students and pupils in classroom. Intelligent and successful latino boy in class. Portrait of male kid smiling, looking at camera
Concepts on blackboard at school. Young people, students and pupils in classroom. Intelligent and successful latino boy in class. Portrait of male kid smiling, looking at camera
4k00:13Concept on blackboard at school. Young people, student and pupil in classroom. Intelligent and successful hispanic girl in class. Portrait of female child smiling, looking at camera, holding books
Concept on blackboard at school. Young people, student and pupil in classroom. Intelligent and successful hispanic girl in class. Portrait of female child smiling, looking at camera, holding books
4k00:36scientist wrote mathematical formulas on a blackboard
scientist wrote mathematical formulas on a blackboard
4k00:11Back View of the Students in the Lecture Hall Listening to a Prominent Professor Giving a Lecture. Charismatic Lecturer Reads to the Bright Young People Study at the University.
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Back View of the Students in the Lecture Hall Listening to a Prominent Professor Giving a Lecture. Charismatic Lecturer Reads to the Bright Young People Study at the University.
4k00:08hand-drawn scribbles transition, doodles and sketch effects with black color pencil on chroma key green screen background, with alpha channel,imagination education child concept
hand-drawn scribbles transition, doodles and sketch effects with black color pencil on chroma key green screen background, with alpha channel,imagination education child concept
4k00:164k close view of pupils in classroom of African children writing English in school notebooks.
4k close view of pupils in classroom of African children writing English in school notebooks.
4k00:14Brilliant Young Academic Finishes Writing Big and Complex Mathematical Formula/ Equation on the Blackboard. Shot on RED EPIC-W 8K Helium Cinema Camera.
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Brilliant Young Academic Finishes Writing Big and Complex Mathematical Formula/ Equation on the Blackboard. Shot on RED EPIC-W 8K Helium Cinema Camera.
4k00:08Scientist writing formulas on chalkboard. Hand with chalk wrote physics formulas on black chalkboard closeup
Scientist writing formulas on chalkboard. Hand with chalk wrote physics formulas on black chalkboard closeup
4k00:16Hand Holding Chalk and Writing Complex and Sophisticated Mathematical Formula on the Blackboard. Underlining Equation. Shot on RED EPIC-W 8K Helium Cinema Camera.
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Hand Holding Chalk and Writing Complex and Sophisticated Mathematical Formula on the Blackboard. Underlining Equation. Shot on RED EPIC-W 8K Helium Cinema Camera.
4k00:18Concepts on blackboard at school. Young people, quiet student and pupil in classroom. Hispanic boy with doubts and thoughts in class. Portrait of male child thinking
Concepts on blackboard at school. Young people, quiet student and pupil in classroom. Hispanic boy with doubts and thoughts in class. Portrait of male child thinking
4k00:264K Portrait of academic man writing math formulas on blackboard
4K Portrait of academic man writing math formulas on blackboard
4k00:08Question mark on chalkboard :4K Footage
Question mark on chalkboard :4K Footage
4k00:15Following Close-up Shot of the Hand Holding Chalk and Writes Complex Mathematical Formula/ Equation on the Blackboard. Shot on RED EPIC-W 8K Helium Cinema Camera.
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Following Close-up Shot of the Hand Holding Chalk and Writes Complex Mathematical Formula/ Equation on the Blackboard. Shot on RED EPIC-W 8K Helium Cinema Camera.
4k00:20scientist wrote mathematical formulas on a blackboard
scientist wrote mathematical formulas on a blackboard
4k00:12Concept on blackboard at school. Young people, student and pupil in classroom. Smart hispanic boy writing math formula on board during lesson. Portrait of male child smiling, looking at camera
Concept on blackboard at school. Young people, student and pupil in classroom. Smart hispanic boy writing math formula on board during lesson. Portrait of male child smiling, looking at camera
4k00:08blackboard with soccer strategies simulation for the attack
blackboard with soccer strategies simulation for the attack
hd00:13AA reproduction of an old classroom
AA reproduction of an old classroom
4k00:13Young people and education. Group of hispanic students in class at school during lesson. Teacher writing on blackboard
Young people and education. Group of hispanic students in class at school during lesson. Teacher writing on blackboard
4k00:12Time-Lapse/ Stop Motion of the Young Man Drawing on Blackboard Inspirational Keywords for Business Start-up. Colorful Drawings with Bits of Wisdom. Shot on RED EPIC-W 8K Helium Cinema Camera.
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Time-Lapse/ Stop Motion of the Young Man Drawing on Blackboard Inspirational Keywords for Business Start-up. Colorful Drawings with Bits of Wisdom. Shot on RED EPIC-W 8K Helium Cinema Camera.
4k00:10Drawing a question mark transformed into a light bulb. Concept of idea coming from thinking. Motion stop style like with chalk on a blackboard.
Drawing a question mark transformed into a light bulb. Concept of idea coming from thinking. Motion stop style like with chalk on a blackboard.
hd00:07Chalk writing - ? on chalkboard
Chalk writing - ? on chalkboard
hd00:15the hand writes on the blackboard a formula / the solution to the equation on the Board
the hand writes on the blackboard a formula / the solution to the equation on the Board
hd00:11Cute children raising their fingers in the classroom
Cute children raising their fingers in the classroom
4k00:16Long Shot of The Busy Office Where Young Creative People Work on Personal Computers, Draw Project Outline on Blackwall and Have Discussions with Colleagues. Stylish People in Trendy Environment. UHD.
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Long Shot of The Busy Office Where Young Creative People Work on Personal Computers, Draw Project Outline on Blackwall and Have Discussions with Colleagues. Stylish People in Trendy Environment. UHD.
4k00:304K Businessman making video call on computer in trendy creative office. Young fun startup company. Shot on RED Epic.
4K Businessman making video call on computer in trendy creative office. Young fun startup company. Shot on RED Epic.
hd00:11Street view of a blackboard advertising store sign on sidewalk. Consumers passing adverts on a billboard. Customers attracted to open small business shop.
Street view of a blackboard advertising store sign on sidewalk. Consumers passing adverts on a billboard. Customers attracted to open small business shop.
4k00:134K Happy little scientist with fake mustache writing math formulas on blackboard
4K Happy little scientist with fake mustache writing math formulas on blackboard
hd00:10Stock Market board moving. Blue color. Looped animation. HD 1080.
Stock Market board moving. Blue color. Looped animation. HD 1080.
hd00:10Stock Market board moving up. HD 1080. Looped animation.
Stock Market board moving up. HD 1080. Looped animation.
hd00:12Social media networking on a blackboard. Connecting people with people.
Social media networking on a blackboard. Connecting people with people.
4k00:11Camera Facing Class: Prominent Professor Writing on the Blackboard and Giving Lecture to a Classroom Full of Multi Ethnic Students. Modern University with Bright Young People in the Lecture Hall.
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Camera Facing Class: Prominent Professor Writing on the Blackboard and Giving Lecture to a Classroom Full of Multi Ethnic Students. Modern University with Bright Young People in the Lecture Hall.
4k00:13Female Developer with Tablet Computer Talks With Programer and Project Manager, They use Blackboard Wall as a Planner. They Work in the Stylish Creative Office. Shot on RED EPIC-W 8K Helium Camera.
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Female Developer with Tablet Computer Talks With Programer and Project Manager, They use Blackboard Wall as a Planner. They Work in the Stylish Creative Office. Shot on RED EPIC-W 8K Helium Camera.
hd00:32schoolboy solves math on the school blackboard 3
schoolboy solves math on the school blackboard 3
hd00:06Question mark written with chalk on a chalkboard
Question mark written with chalk on a chalkboard
4k00:07Empty classroom with wooden desks, white and green chalk boards in school. empty classroom. Abandoned School classroom with school desks and blackboard
Empty classroom with wooden desks, white and green chalk boards in school. empty classroom. Abandoned School classroom with school desks and blackboard
hd00:18A small group of students look happy and smile while they are working on whiteboards and digital tablets at school.
A small group of students look happy and smile while they are working on whiteboards and digital tablets at school.
4k00:24Talanted dj is creating music in a recording studio on a mixing console.
Talanted dj is creating music in a recording studio on a mixing console.
hd00:29Success Brainstorming Mind Map on Blackboard
Success Brainstorming Mind Map on Blackboard
4k00:24Older man teaching in classroom pointing at diagrams on a blackboard
Older man teaching in classroom pointing at diagrams on a blackboard
hd00:15People Network
People Network
4k00:16Brilliant Young Mathematician Approaches Big Blackboard and Thinks about Solving Long and Complex Equation/ Formula. Shot on RED EPIC-W 8K Helium Cinema Camera.
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Brilliant Young Mathematician Approaches Big Blackboard and Thinks about Solving Long and Complex Equation/ Formula. Shot on RED EPIC-W 8K Helium Cinema Camera.
4k00:14Top Manager and Female Executive Outlining Company Optimization Plan on a Glass Blackboard, Drawing with Market and Using Smartphone while Standing in the Modern Glass and Concrete Office.
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Top Manager and Female Executive Outlining Company Optimization Plan on a Glass Blackboard, Drawing with Market and Using Smartphone while Standing in the Modern Glass and Concrete Office.
4k00:21Family. drawing on a blackboard, 2d animation. 4K
Family. drawing on a blackboard, 2d animation. 4K
4k00:304K Young business group working & brainstorming in trendy creative office. Young fun startup company. Shot on RED Epic.
4K Young business group working & brainstorming in trendy creative office. Young fun startup company. Shot on RED Epic.
hd00:08Teacher wrote in chalk on a blackboard
Teacher wrote in chalk on a blackboard
hd00:22Whiteboard Soccer
Whiteboard Soccer
4k00:12Young people and education. Group of hispanic students in class at school during lesson. Portrait of happy latina girl, hispanic student smiling at camera
Young people and education. Group of hispanic students in class at school during lesson. Portrait of happy latina girl, hispanic student smiling at camera
4k00:20Food Truck owner opening for business
Food Truck owner opening for business
hd00:12Female student writing math formulas. RAW video record.
Female student writing math formulas. RAW video record.
hd00:26Male teenager trying to solve math equation at high school blackboard
Male teenager trying to solve math equation at high school blackboard
hd00:23A scientist using a multichannel pipette to transfer liquid into a micro-titer plate.
A scientist using a multichannel pipette to transfer liquid into a micro-titer plate.
4k00:10School classroom with desks and blackboard
School classroom with desks and blackboard
4k00:15Digitally generated of math formulas on blackboard
Digitally generated of math formulas on blackboard
4k00:184K Portrait smiling man in white coat writing math formulas on blackboard Dec 2016-UK
4K Portrait smiling man in white coat writing math formulas on blackboard Dec 2016-UK
4k00:274K Teacher writing math formulas on blackboard and talking to her class (UK-Oct 2016)
4K Teacher writing math formulas on blackboard and talking to her class (UK-Oct 2016)
hd00:10Cute Boy With A Space-Themed Chalkboard Drawing
Cute Boy With A Space-Themed Chalkboard Drawing
hd00:14Social media networking on a blackboard. Connecting people with people.
Social media networking on a blackboard. Connecting people with people.
4k00:11High-Angle Shot of a Brilliant Young Student Writing Big Sophisticated Mathematical Formula/ Equation on the Blackboard. Shot on RED EPIC-W 8K Helium Cinema Camera.
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High-Angle Shot of a Brilliant Young Student Writing Big Sophisticated Mathematical Formula/ Equation on the Blackboard. Shot on RED EPIC-W 8K Helium Cinema Camera.
4k00:27Woman's hand writing all months from January to December with white chalk on blackboard
Woman's hand writing all months from January to December with white chalk on blackboard
hd00:10chalk draw question mark sign animation on blackboard background seamless loop \ new dynamic joyful video footage
chalk draw question mark sign animation on blackboard background seamless loop \ new dynamic joyful video footage
hd00:06cartoon marker drawn planet earth globe spin on white blackboard background seamless endless loop animation - new quality unique handmade retro vintage stop motion dynamic joyful video
cartoon marker drawn planet earth globe spin on white blackboard background seamless endless loop animation - new quality unique handmade retro vintage stop motion dynamic joyful video
hd00:10Congrats Text Alpha Channel
Congrats Text Alpha Channel
hd00:08the hand writes on the blackboard a formula / the solution to the equation on the Board
the hand writes on the blackboard a formula / the solution to the equation on the Board
4k00:11Stop motion drawing megaphone on black chalkboard. Paper lettering fake news
Stop motion drawing megaphone on black chalkboard. Paper lettering fake news
hd00:07Education concept - ABC alphabet school blackboard concept. School teacher writing ABC alphabet in English class or preschool.on chalkboard.
Education concept - ABC alphabet school blackboard concept. School teacher writing ABC alphabet in English class or preschool.on chalkboard.
hd00:26Whiteboard Soccer
Whiteboard Soccer
4k00:06 Yes or No decision making - choosing YES on chalkboard
Yes or No decision making - choosing YES on chalkboard
4k00:154k front view of classroom of African students , in a lesson, writing English language notes in school books.
4k front view of classroom of African students , in a lesson, writing English language notes in school books.
hd00:12Famous Albert Einstein s equation E=mc2 handwritten on chalkboard or blackboard by teacher or businessman
Famous Albert Einstein s equation E=mc2 handwritten on chalkboard or blackboard by teacher or businessman
4k00:20Writing a math formula with a chalk on a blackboard. Great clip for your education, school or learning projects.
Writing a math formula with a chalk on a blackboard. Great clip for your education, school or learning projects.
hd00:11Cafe Blackboard Store Sign
Cafe Blackboard Store Sign
4k00:174K Portrait of thinking woman sitting in front of blackboard with math formulas
4K Portrait of thinking woman sitting in front of blackboard with math formulas
hd00:37Handwritten mathematics formulas flying from chalkboard towards camera, seamlessly looping
Handwritten mathematics formulas flying from chalkboard towards camera, seamlessly looping
hd00:20Maths equation loop with alpha channel
Maths equation loop with alpha channel
4k00:37Toothless little girl learns math with female teacher while writing on the blackboard and smiling at the camera, shot in 4k resolution
Toothless little girl learns math with female teacher while writing on the blackboard and smiling at the camera, shot in 4k resolution
4k00:08Hand drawing a strategy on a blackboard.
Hand drawing a strategy on a blackboard.
4k00:10Learn English confident beautiful woman teacher chalk blackboard
Learn English confident beautiful woman teacher chalk blackboard
4k00:14Time-Lapse of the Brilliant Young Mathematician Writing Formula on the Blackboard. Shot on RED EPIC-W 8K Helium Cinema Camera.
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Time-Lapse of the Brilliant Young Mathematician Writing Formula on the Blackboard. Shot on RED EPIC-W 8K Helium Cinema Camera.
hd00:20Four 5-second wipe transitions. White paint brush strokes on a black background. These hand-drawn scribbles, doodles and sketch effects can be used as Luma Mattes (alpha channels) in editing software.
Four 5-second wipe transitions. White paint brush strokes on a black background. These hand-drawn scribbles, doodles and sketch effects can be used as Luma Mattes (alpha channels) in editing software.
hd01:00Math calculations or formulas appearing in chalk on black board, computer generated loopable motion background.
Math calculations or formulas appearing in chalk on black board, computer generated loopable motion background.
4k00:07Teacher asking elementary school kids a question in class
Teacher asking elementary school kids a question in class
hd00:17Many Ideas
Many Ideas
hd00:17Social Network
Social Network
4k00:07Entire table filled by Post-it papers - stop motion animation
Entire table filled by Post-it papers - stop motion animation
4k00:304K Casual businessmen in discussion, drawing on blackboard & creating business plan. Young startup company. Shot on RED Epic.
4K Casual businessmen in discussion, drawing on blackboard & creating business plan. Young startup company. Shot on RED Epic.
4k00:16A charismatic old teacher laughing near the blackboard 4K
A charismatic old teacher laughing near the blackboard 4K
4k00:12Hands with movie production clapper board, on black
Hands with movie production clapper board, on black
4k00:14Personal Computer with Mock-up Green Screen Monitor Stands on the Office Desk. In the Background Man Works in the Creative Office at Daytime
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Personal Computer with Mock-up Green Screen Monitor Stands on the Office Desk. In the Background Man Works in the Creative Office at Daytime
4k00:13close up portrait of a woman surgeon or doctor with mask ready for operation in hospital or clinic.
close up portrait of a woman surgeon or doctor with mask ready for operation in hospital or clinic.
hd00:11One and one make two handwritten on blackboard or chalkboard by teacher or businessman
One and one make two handwritten on blackboard or chalkboard by teacher or businessman
hd00:21Hand of pupil solving equation on chalkboard
Hand of pupil solving equation on chalkboard
4k00:15Animation of drawing algebra formulas and graphics with chalk on school blackboard
Animation of drawing algebra formulas and graphics with chalk on school blackboard
hd00:20math physics formulas black and white. computer generated loopable motion background
math physics formulas black and white. computer generated loopable motion background
4k00:284K Portrait of happy cute little scientist standing in front of blank blackboard
4K Portrait of happy cute little scientist standing in front of blank blackboard
4k00:294K Happy little scientist with fake mustache writing math formulas on blackboard
4K Happy little scientist with fake mustache writing math formulas on blackboard
4k00:09close up portrait of a surgeon or doctor with mask and headset ready for operation in hospital or clinic. The surgeon smiles safe and proud of himself. Concept of medicine, hospitals and doctors, care
close up portrait of a surgeon or doctor with mask and headset ready for operation in hospital or clinic. The surgeon smiles safe and proud of himself. Concept of medicine, hospitals and doctors, care
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