How to make dropbox video embed responsive

So I have to problems. I am trying to embed a dropbox video into my website and I have successfully gotten it to show up and play in the designer, but it doesn’t play on my published site. This is the code I am using:

this is the link to the video: Dropbox - round.mp4 - Simplify your life


Here is my site Read-Only: Webflow - Andreah.co

Hello Andreah

Was just searching webflow as have this problem also. As it was 11months ago you might of resolved it, but i copied your code and it works.

I even just used the mp4 part + it works
Did you work it out?

Cheers