Video block rounded corners not working

I can get the video border with rounded corners via css but not the video itself. Screenshot attached. I'm using the following code. I'd like to apply this to all videos across my site. Can someone tell me what's wrong?

#block-yui_3_17_2_1_1668437815607_52957{
   outline: solid 5px #66095D;
  border-radius: 10px;
  background: #66095D
   }
.player {
  border-radius: 10px;
  overflow: hidden;
  z-index: 1;
  height: 320px;
  width: 480px;
}

Separately - does anyone have css code for background videos with rounded corners when inset?

https://hibiscus-dachshund-wk7b.squarespace.com/config/design

pw: forumhelp1

Thank you!

Hi! You'll need to use the clip-path property rather than border radius, try adding this to your Custom CSS, adjust the 10px to match your background border radius.

.video-player {
  -webkit-clip-path: inset(0px round 10px);
  clip-path: inset(0px round 10px);
}

Hope that helps!

Try this solution for inset background rounded corners:

https://www.sqsmods.com/round-corners-inset-background