Craft Edge

I am trying to watch the tutorials and when I click on full screen size it really does not make the video itself (mat, etc.) very much larger. It just has more black space around it. I want to see the video itself larger, not just more black space to make it a larger screen size. How can I see this better?? TIA

When I tried one the other day, it would be full screen until I clicked on one of the video controls (like pause), then it would be regular sized with the black around it. I would have to exit full screen and then go back to have true full screen again.

Thanks Heather, I went back in and there were some videos that were full screen size, then I re-opened the two or three that I had frustratingly watched, and lo and behold, I can now see them full screen size!!! I must be losing my mind, but I swear, they were not that way the first time!!