allowfullscreen

an HTML attribute for the iframe tag

How do you implement allowfullscreen in a video tag?

Answers:

To implement the allowfullscreen feature in a video element using HTML, you'll need to utilize the <iframe> tag. The allowfullscreen attribute is supported primarily in the context of iframes, such as those used for embedding videos from platforms like YouTube or Vimeo.

However, if you're working with the <video> tag itself (for self-hosted videos), you won't need allowfullscreen, as the native video player provides full-screen capabilities directly.

For an <iframe>:

Here's how to use the allowfullscreen attribute with an iframe for embedded videos:
```
<iframe src="https://www.youtube.com/embed/videoID" 
        width="560" 
        height="315" 
        frameborder="0" 
        allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" 
        allowfullscreen></iframe>
```
For an HTML <video> tag:

If you are using the <video> tag for a self-hosted video, you can enable full-screen functionality through the controls attribute, like so:
```
<video width="560" height="315" controls>
    <source src="video.mp4" type="video/mp4">
    Your browser does not support the video tag.
</video>
```
Summary:
- Use allowfullscreen: For iframes only (common for embedding third-party videos).
- Use controls: For the <video> tag so users can enter full-screen mode directly with the native controls.
By following these guidelines, you can implement full-screen functionality effectively in your video content.

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