I noticed that using an audio file in <video> works fine.

Does this feature have good browser compatibility and is it an HTML5 standard?

I found this but it's from 7 years ago and has no answers.

CodePudding user response：

Yes a <video> element is supposed to be able to play media resources that only contain audio data, just like an <audio> element is supposed to be able to play video media (without displaying the video stream).
A browser that wouldn't do that would be a buggy browser.

CodePudding user response：

<video> tag supports most browsers like chrome, edge, firefox, safari, and opera.

It is a global attribute in HTML5.

For Audio you can also use <audio>.

If you want to know more there is something you can check out https://www.w3schools.com/tags/tag_video.asp