How do you mask a video?

I am getting extremely frustrated with this. Nobody seems to know how to do this with a YouTube video. Everybody just does the same damn thing with text.

I want to crop/mask a video into a square and vertical size.

Is this possible or not?

Hi Jake!

For a regular video?

I guess so:

Not so sure about youtube embed. It might be worth fiddling around with the iframe width and height settings within the embed code.

Never tried it myself though, only did some research for you.