What attribute would you use with the <video> tag to enable autoplay?

The attribute used with the <video> tag to enable autoplay is "autoplay." When this attribute is present, it signals the browser to automatically begin playing the video as soon as it is ready, without requiring the user to initiate playback. This can enhance user experience by providing immediate content engagement, especially in scenarios where videos are part of a dynamic webpage layout.

The other options do not serve the same function. For instance, "play" is not a recognized attribute for the <video> tag, and there's no standard attribute named "start" that specifically triggers autoplay. The "loop" attribute, while useful for repeating video playback, does not initiate autoplay on its own; it simply takes effect after the video has started playing. Thus, the "autoplay" attribute is uniquely designed for immediate video playback, making it the correct choice.