Last week I had to do one of those horrible "upgrades" on my PC. I didn't have a choice in the matter.

Long story short. I can't view videos on youtube or any other videos any more. Here's what I get

If someone is talking.... all you see is a pair of lips..... seriously HUGE lips.... If someone is driving away in their car all I see is one HUGE tail light.

Other than that.... everything is the same .

Can someone please tell me how to get my youtube and other videos to shrink back to normal size; and what size they should actually be? I use youtube videos all the time when I need help with my knitting and crocheting stitches. I'M JUST LOST!!!
Is there a folder in my PC somewhere. I'm using an HP that started out as windows 8 and has worked its way up to windows 10.

Thanks for any help you can give me.