We'll see.At the moment I see any ads, nor nags in YT, using userscripts instead of extensions, but anyway I'm going to keep an eye on what's happening in Greasyfork and OpenuserJS regarding YT in the future, this in any case offers many more options than the castrated extensions that will be in the stores to be able to stay there.
Not with the crrent ones, it's easier to difference ads by code than by content in most Vids, eg, divulgations, news, influencers, etc. YT, to not destroy the own business modell, also avoiding that there later also 5 years old vids with outdated ads, must use some kind of dynamic insertion, that means, it can be discovered and skipped by some userscripts, for sure not in the extension stores, but in Greasyfork or OpenuserJS, which are independent from Google influence.
Try to watch the video embedded, simply edit it's URL, using instead of
https://www.youtube.com/watch?v=xxxxxxxx
this URL
https://www.youtube.com/embed/xxxxxxxx
No, not in it's actual form, nor the front-ends can't not longer cutting the ads with their current form. Or they change their script, or you have the alternative to use YT or using another streaming service. But I think that there will be other solution in the future to show the middle finger to YT.
YT has 2 posibilities
I think they'll hit their teeth against a rock with this.
Meanwhile a lot of content creators a changing to Odysee
Always was, welcome to capitalism
It should not be missing from the Bookmarks:
Also usefull
There are also some more I use
Yes, in Linux you need 3-4 different apps to do the same as you can do with ShareX
Whack-a-mole
Yes, but anyway, everybody wish ShareX in Linux, but nobody dares to fork ShareX for Linux. Until now there sadly isn't any equivalent tool for Linux
Flameshot is a really nice screenshot tool, but the big drawback is, that it only upload to Imgur, one of the worst Data hogs. The best and most complete is ShareX, there you can set the destinations to your like, but it has also a big drawback, it's Windows only (depends on NETframework, same as Greenshot)
➡️ 
You can use Flameshot, but recomment to store the screenshots only locally and upload to share/host later to, eg vgy.me, or some self hosted one, like FileCoffee (valid for all type of files, image, video, multimedia, documents, presentations, etc.)
In the US? Yes
I'm not so pessimistic, as the proverb says, where there is a law, there is also a way around it. There are many very capable devs who are screwed by YT and Google as well like us and in the script repositories they have a free hand, which as devs for extensions they do not have. YT is the only problem for adblockers, even the inbuild blocker in Vivaldi works flawles, even cutting off cookie advices and some paywalls, only in YT it fails. But the userscript I use instead in YT work there even better than uBO, at least until now. Extensions are all limited by the imposed norms in the stores, more in the near future, it's this because I trust more in scripts, at least for certain tasks.. As said, we'll see.