I was wondering if there was an application or something that would allow me to view a workspace in the corner of another workspace?

For example if I had a video playing on one workspace, I'd be able to view it in another workspace while working on something.

I know it's quite a strange idea, but I think that would be quite a cool addition.

I'm a programmer but I've never made anything for Ubuntu so I'm not quite sure how to code something like this, so any ideas or suggestions would be very much appreciated.