Here is a one minute video that might help with the You Tube issue. I don't watch a lot of videos and have never seen that issue. Do you have a You Tube account, Buck? I do not.
Regarding the spacing message...I cannot find anything that says WIN11 gives such a message. Are you getting it here when you type a comment? I do find where people have issues with how the type appears, but nothing about WIN11 telling you it's wrong. One tip that might help is to change the Line Spacing to anything other than "Exactly," but I cannot find where line spacing even exists in WIN11...it should be application (or site) specific.
I bet it's a browser setting. What browser are you using? And what do you mean "I did not hit the space bar"? You are putting spaces in between words, right?