Having trouble with video playback

I have been working on windows since 3.1 and win 10 is definitely the glitchiest. I have a coupe of problems.

First: I have trouble playing videos on certain sites. The one where I have the biggest problem is TMZ but that is not the only site. Videos on youtube are fine.

Second: I've attached an error message I get whenever I screen shot photos, mostly from twitter, and then try to email them or transfer these images to a thumb drive. I don't get any error msg when I repost the screen shots on twitter.

Any help would be greatly appreciated.

I'm not sure. Here's a screen shot of my defender settings.

When I compare my file explorer to the one in the tutorial, I am missing the "search tools" function.

My Windows Defender Controlled Folder Access is turned off. Does it need to be on?

I don't think that's it b/c I never got this error msg with my last laptop with win 7 and I used the same thumb drives. Plus it doesn't explain why I get the same error msg when I try to email these images which I was also able to do with my old laptop.