Answer 1

Add video controls, as your video requires you to press the play button, so that it can work.

Answer 2

Probably autoplay is the reason why it is not working. You know, these property is very restricted by the navigators

Answer 3

You can switch to "controls" instead of "autoplay" to at least see how it looks

Answer 4

Autoplay had been deprecated because it was misused to harm user experience.

Answer 5

Most of browsers ignore or restrict autoplay attribute because it has been given a bad or intensive use, deprecating user experience. So them only enable autoplay once the user has interacted with the page in almost all websites.

Thus, you have to keep it in mind if you're planning to autoplay video or audio in a site you're developing.

Here's something that could be useful in that cases:

https://code.sololearn.com/WTyqjBYM291q/?ref=app