video html5 youtube src code example
Example 1: how to embed videos in html
<iframe src="example.mp4" width="100px" height="100px"></iframe>
Example 2: HOW TO USE A video on a html website from youtube
<iframe width="560" height="315" src="https://www.youtube.com/embed/thatthingonvideourl" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>