Create a video using html

Tell us what’s happening:
Hi all! i’m currently working on the product landing page project, and I was wondering if anyone ran into an issue with the video tag? When I tried using it, it just gave me a blank canvas with the controls at the bottom but no media. I ended up using the iframe tag that obtained from copying the embed code of the video. Can anyone explain this to me, please thank you in advance.

Here is what I’ve done so far, its not quite complete. I’m open to critiques, and suggestion.

I was looking and maybe the html5 video tag doesn’t support youtube videos, I am not sure. But you could read this