Video tag basics in HTML - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the <video> tag in HTML?

The <video> tag is used to embed video content in a web page so users can watch videos directly in their browser.

beginner

Which attribute makes a video start playing automatically when the page loads?

The autoplay attribute makes the video start playing automatically without user interaction.

beginner

How do you add controls like play, pause, and volume to a video?

Add the controls attribute inside the <video> tag to show built-in video controls.

intermediate

What is the purpose of the <source> tag inside a <video> element?

The <source> tag specifies the video file and its format. Multiple <source> tags can provide different formats for browser compatibility.

intermediate

Why should you include the <track> tag inside a <video> element?

The <track> tag adds subtitles or captions to the video, improving accessibility for users who are deaf or hard of hearing.

Which attribute is used to show video controls like play and pause?

A autoplay

B controls

C loop

D muted

The controls attribute adds built-in video controls for user interaction.

How do you make a video play automatically when the page loads?

A Add the <code>autoplay</code> attribute

B Add the <code>loop</code> attribute

C Add the <code>muted</code> attribute

D Add the <code>controls</code> attribute

The autoplay attribute makes the video start playing automatically.

What tag do you use inside <video> to provide multiple video formats?

A <track>

B <object>

C <source>

D <embed>

The tag specifies different video files and formats for browser support.

Which tag is important for accessibility to add captions to videos?

A <track>

B autoplay

C controls

D loop

The tag adds subtitles or captions to help users who need them.

What happens if you add the loop attribute to a video?

A The video shows controls

B The video plays only once

C The video is muted

D The video plays repeatedly in a loop

The loop attribute makes the video start over automatically after it ends.

Explain how to embed a video in a web page using the

Think about how you provide fallback video formats and user controls.

Describe why adding captions with the tag is important for video accessibility.

Consider users who cannot hear the audio.

Practice

1. What is the main purpose of the <video> tag in HTML?

easy

A. To embed videos directly on a webpage

B. To create audio playlists

C. To add images to a webpage

D. To style text content

Solution

1. Step 1: Understand the role of the <video> tag

   The <video> tag is designed to embed video content directly into HTML pages.

2. Step 2: Compare with other options

   Options A, B, and C relate to audio, images, and text styling, which are not the purpose of <video>.

3. Final Answer:

   To embed videos directly on a webpage -> Option A

4. Quick Check:

   <video> tag = embed videos [OK]

Hint: Remember: <video> is for videos, not audio or images [OK]

Common Mistakes:

• Confusing <video> with <audio> tag
• Thinking <video> adds images
• Assuming <video> styles text

2. Which of the following is the correct way to add playback controls to a video using the <video> tag?

easy

A. <video src="movie.mp4" play></video>

B. <video src="movie.mp4" playcontrols></video>

C. <video src="movie.mp4" control></video>

D. <video src="movie.mp4" controls></video>

Solution

1. Step 1: Identify the correct attribute for controls

   The correct attribute to add playback controls is controls without any extra letters.

2. Step 2: Check each option's attribute spelling

   <video src="movie.mp4" controls></video> uses controls correctly; others have incorrect or non-existent attributes.

3. Final Answer:

   <video src="movie.mp4" controls></video> -> Option D

4. Quick Check:

   Use controls attribute to add buttons [OK]

Hint: Use exactly 'controls' attribute to show video buttons [OK]

Common Mistakes:

• Misspelling 'controls' as 'control' or 'playcontrols'
• Using non-existent attributes like 'play'
• Forgetting to close the video tag properly

3. What will the following HTML code do when opened in a modern browser?

<video controls>
  <source src="video.webm" type="video/webm">
  <source src="video.mp4" type="video/mp4">
  Your browser does not support the video tag.
</video>

medium

A. Show error message and no video

B. Play video.mp4 only, ignoring video.webm

C. Play video.webm if supported, else video.mp4

D. Play both videos simultaneously

Solution

1. Step 1: Understand multiple <source> tags in <video>

   The browser tries each <source> in order and plays the first supported format.

2. Step 2: Analyze the source order and browser support

   If the browser supports WebM, it plays video.webm; otherwise, it falls back to video.mp4.

3. Final Answer:

   Play video.webm if supported, else video.mp4 -> Option C

4. Quick Check:

   Multiple sources = fallback to supported video [OK]

Hint: Browser picks first supported source in order [OK]

Common Mistakes:

• Assuming both videos play at once
• Thinking only the last source is used
• Ignoring fallback text for unsupported browsers

4. Identify the error in this video tag code:

<video src="movie.mp4" controls>
  <source src="movie.webm" type="video/webm">
</video>

medium

A. The controls attribute is misspelled

B. The src attribute should not be used with <source> tags inside <video>

C. The <source> tag is missing a closing slash

D. The <video> tag cannot have multiple sources

Solution

1. Step 1: Understand usage of src and <source> tags

   When using multiple <source> tags, the src attribute on <video> should be omitted to avoid conflicts.

2. Step 2: Check other options for errors

   controls is spelled correctly, <source> tags do not require closing slashes in HTML5, and multiple sources are allowed.

3. Final Answer:

   The src attribute should not be used with <source> tags inside <video> -> Option B

4. Quick Check:

   Use either src or <source>, not both [OK]

Hint: Don't mix video src attribute with source tags [OK]

Common Mistakes:

• Using src on video with source tags
• Thinking <source> needs closing slash
• Believing controls attribute is misspelled

5. You want to embed a video that automatically plays, loops, and is muted by default for better user experience. Which of the following is the correct <video> tag to achieve this?

hard

A. <video src="clip.mp4" autoplay loop muted></video>

B. <video src="clip.mp4" autoplay muted></video>

C. <video src="clip.mp4" autoplay loop controls></video>

D. <video src="clip.mp4" loop controls></video>

Solution

1. Step 1: Identify required attributes for autoplay, loop, and mute

   The attributes autoplay, loop, and muted enable automatic play, repeating, and silent start respectively.

2. Step 2: Check which option includes all three without extra controls

   <video src="clip.mp4" autoplay loop muted></video> has all three attributes and no controls, matching the requirement exactly.

3. Final Answer:

   <video src="clip.mp4" autoplay loop muted></video> -> Option A

4. Quick Check:

   Use autoplay, loop, muted together for silent looping video [OK]

Hint: Combine autoplay, loop, muted attributes for silent looping video [OK]

Common Mistakes:

• Forgetting muted causes autoplay to block
• Adding controls when not needed
• Missing one of the required attributes