C a video tag to display j31balloon.mp4 so that it fits the width of this cell. Display anautomated text-based error message if the browser does not support this video type

Sure, here is how you can use the HTML5 video tag to display a video and show an error message if the browser does not support the video type:

<video width="100%" controls>
  <source src="j31balloon.mp4" type="video/mp4">
  Your browser does not support the video tag or the file format of this video. 
</video>

Here's a step-by-step explanation:

1. <video width="100%" controls>: This is the video tag. The width attribute is set to 100% to make the video fit the width of the cell. The controls attribute adds video controls, like play, pause, and volume.

2. <source src="j31balloon.mp4" type="video/mp4">: The source tag is used to specify the video file. The src attribute holds the video file url, and the type attribute specifies the MIME type of the video.

3. Your browser does not support the video tag or the file format of this video.: This text will be displayed if the browser does not support the video tag or the video file format.

4. </video>: This is the closing tag for the video element.