Rounded corners not displaying on mobile

Have seen a few people have this same issue - rounded corners not displaying on mobile for background video. The round corners display fine in desktop view and in the designer.

I have tried adding a transparent border and this did not fix.

Anyone know why this could be happening and how to fix?

Here is my site Read-Only: Webflow - Christian Love's New Site

Another issue I am having is that my “back to top”/ up button is not working on mobile. Works perfectly on desktop.