Vídeos stock livres de direitos de Quadro negro

14.144 vídeos stock livres de direitos de quadro negro

of 142
hd00:29Math and Science Blackboard Scribbling
Math and Science Blackboard Scribbling
4k00:07Hand Holding Chalk and Writing Complex and Sophisticated Mathematical Formula/ Equation on the Blackboard. Shot on RED EPIC-W 8K Helium Cinema Camera.
Hand Holding Chalk and Writing Complex and Sophisticated Mathematical Formula/ Equation on the Blackboard. Shot on RED EPIC-W 8K Helium Cinema Camera.
hd00:11"A B C" is written on a chalkboard, erased (Best for Web Use)
"A B C" is written on a chalkboard, erased (Best for Web Use)
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
4k00:14Brilliant Young Mathematician Approaches Blackboard and Finishes Solving Long and Complex Equation. Shot on RED EPIC-W 8K Helium Cinema Camera.
Brilliant Young Mathematician Approaches Blackboard and Finishes Solving Long and Complex Equation. 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
4k00:36scientist wrote mathematical formulas on a blackboard
scientist wrote mathematical formulas on a blackboard
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
4k00:16Time-Lapse of the Brilliant Young Mathematician Writes Complex Equation on the Blackboard. Shot on RED EPIC-W 8K Helium Cinema Camera.
Time-Lapse of the Brilliant Young Mathematician Writes Complex Equation on the Blackboard. Shot on RED EPIC-W 8K Helium Cinema Camera.
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.
4k00:08Scientist 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
4k00:264K Portrait of academic man writing math formulas on blackboard
4K Portrait of academic man writing math formulas on blackboard
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
4k00:08hand-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
4k00:14Brilliant Young Academic Finishes Writing Big and Complex Mathematical Formula/ Equation on the Blackboard. Shot on RED EPIC-W 8K Helium Cinema Camera.
Brilliant Young Academic Finishes Writing Big and Complex Mathematical Formula/ Equation on the Blackboard. Shot on RED EPIC-W 8K Helium Cinema Camera.
hd00:12Social media networking on a blackboard. Connecting people with people.
Social media networking on a blackboard. Connecting people with people.
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
4k00:11Back 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.
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.
4k00:20scientist wrote mathematical formulas on a blackboard
scientist wrote mathematical formulas on a blackboard
4k00:08blackboard with soccer strategies simulation for the attack
blackboard with soccer strategies simulation for the attack
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
hd00:07Chalk writing - ? on chalkboard
Chalk writing - ? on chalkboard
4k00:08Question mark on chalkboard :4K Footage
Question mark on chalkboard :4K Footage
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.
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.
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.
hd00:11Cute children raising their fingers in the classroom
Cute children raising their fingers in the classroom
hd00:29Success Brainstorming Mind Map on Blackboard
Success Brainstorming Mind Map on Blackboard
hd00:08Teacher wrote in chalk on a blackboard
Teacher wrote in chalk on a blackboard
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.
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
hd00:10Stock Market board moving. Blue color. Looped animation. HD 1080.
Stock Market board moving. Blue color. Looped animation. HD 1080.
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 up. HD 1080. Looped animation.
Stock Market board moving up. HD 1080. Looped animation.
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
hd00:10Cute Boy With A Space-Themed Chalkboard Drawing
Cute Boy With A Space-Themed Chalkboard Drawing
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.
4k00:16Long 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.
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.
4k00:16Hand Holding Chalk and Writing Complex and Sophisticated Mathematical Formula on the Blackboard. Underlining Equation. Shot on RED EPIC-W 8K Helium Cinema Camera.
Hand Holding Chalk and Writing Complex and Sophisticated Mathematical Formula on the Blackboard. Underlining Equation. Shot on RED EPIC-W 8K Helium Cinema Camera.
4k00:24Older 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
4k00:21Family. drawing on a blackboard, 2d animation. 4K
Family. drawing on a blackboard, 2d animation. 4K
hd00:17Many Ideas
Many Ideas
hd00:22Whiteboard Soccer
Whiteboard Soccer
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.
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.
hd00:20Maths equation loop with alpha channel
Maths equation loop with alpha channel
hd00:12Female student writing math formulas. RAW video record.
Female student writing math formulas. RAW video record.
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
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
hd00:25math physics formulas on chalkboard panning, computer generated loopable motion background. HD 1080 progressive
math physics formulas on chalkboard panning, computer generated loopable motion background. HD 1080 progressive
hd00:14Social media networking on a blackboard. Connecting people with people.
Social media networking on a blackboard. Connecting people with people.
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.
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
4k00:27Woman'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
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)
hd00:06Student in class writing on chalkboard.
Student in class writing on chalkboard.
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
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
4k00:37Toothless 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
4k00:11Camera 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.
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.
4k00:20Writing 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
hd00:30Mobile App Development Blackboard Scribblings
Mobile App Development Blackboard Scribblings
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
4k00:08Hand drawing a strategy on a blackboard.
Hand drawing a strategy on a blackboard.
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.
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
hd00:17Social Network
Social Network
hd00:26Whiteboard Soccer
Whiteboard Soccer
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.
hd00:21Hand of pupil solving equation on chalkboard
Hand of pupil solving equation on chalkboard
4k00:10Learn English confident beautiful woman teacher chalk blackboard
Learn English confident beautiful woman teacher chalk blackboard
4k00:12Hands with movie production clapper board, on black
Hands with movie production clapper board, on black
hd00:20math physics formulas black and white. computer generated loopable motion background
math physics formulas black and white. computer generated loopable motion background
hd00:37Handwritten mathematics formulas flying from chalkboard towards camera, seamlessly looping
Handwritten mathematics formulas flying from chalkboard towards camera, seamlessly looping
4k00:20Food Truck owner opening for business
Food Truck owner opening for business
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
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
4k00:11Stop motion drawing megaphone on black chalkboard. Paper lettering fake news
Stop motion drawing megaphone on black chalkboard. Paper lettering fake news
hd00:12chalk crayon hand drawn earth globe spin on black space background \ new dynamic animation seamless endless loop joyful colorful video footage
chalk crayon hand drawn earth globe spin on black space background \ new dynamic animation seamless endless loop joyful colorful video footage
4k00:07Entire table filled by Post-it papers - stop motion animation
Entire table filled by Post-it papers - stop motion animation
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
4k00:30Teacher writing math formulas on blackboard
Teacher 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
hd00:20view from the train window late at night. full moon
view from the train window late at night. full moon
4k00:06School's out for summer - or maybe fall break, winter vacation or spring break. The desks sit abandoned while students are out of school on hiatus. Handheld shot drifts over the empty desks.
School's out for summer - or maybe fall break, winter vacation or spring break. The desks sit abandoned while students are out of school on hiatus. Handheld shot drifts over the empty desks.
hd00:14Empty high-school classroom, Chiba Prefecture, Japan
Empty high-school classroom, Chiba Prefecture, Japan
4k00:20Attractive diverse business group in a team meeting in modern city office.
Attractive diverse business group in a team meeting in modern city office.
4k00:14Time-Lapse of the Brilliant Young Mathematician Writing Formula on the Blackboard. Shot on RED EPIC-W 8K Helium Cinema Camera.
Time-Lapse of the Brilliant Young Mathematician Writing Formula on the Blackboard. Shot on RED EPIC-W 8K Helium Cinema Camera.
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.
4k00:13close 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.
hd00:18A pupil solves math on the chalkboard at primary school, Close up, Full HD shot
A pupil solves math on the chalkboard at primary school, Close up, Full HD shot
4k00:16A charismatic old teacher laughing near the blackboard 4K
A charismatic old teacher laughing near the blackboard 4K
4k00:294K Entrepreneur businesswoman puts on headphones & relaxes at her desk. Blackboard with drawings of charts, graphs & ideas in background. Shot on RED Epic.
4K Entrepreneur businesswoman puts on headphones & relaxes at her desk. Blackboard with drawings of charts, graphs & ideas in background. Shot on RED Epic.
hd00:14Billboard green screen in St.Petersburg night street. timelapse
Billboard green screen in St.Petersburg night street. timelapse
4k00:07Teacher asking elementary school kids a question in class
Teacher asking elementary school kids a question in class
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