If someone put a malware into a file on Google Drive or MS OneDrive, it is good for Web Shield to detect it. But because of one or a few malware, is Avast going to block these drives totally making them unusable.
Also, as I said, I used another reputable AV and it sometimes blocks a script here and there without blocking the site or the video.
Even if Web Shield doesn't block the malware, File Shield will detect it if downloaded and deal with it.
My point is that Avast Web Shield is overkill in dealing with video sites. It needs to adopt recognised malware lists instead of relying on someone to report the sites. That someone may have ulterior motives.
Your system, your choice, your a/v of choice.
It would seem that you are objecting to one antivirus blocking something you want to freely view, (it's very annoying, I know) whereas another antivirus does not block and that would seem to work the way you think all antivirus programs should work.
The people at Avast who actually do the work (And it is not us, us Evangelists. We are just here to use our knowledge to help other users.) are looking out for you and everyone else and use their professional training to protect all of us from harm. In a perfect world there would be no malware, but this world is imperfect and there actors out there that live to inflict harm on our systems, commit ransomware, and cause misery and worse.
Some of us have devices that enable us to live, and if these devices are compromised, their lives are at risk, even death is possible. I have to say, do they really care?
Yes, there are false positives because it is an imperfect world, but don't throw the baby out the bath water. Keep the baby and keep your system alive, to live another day.
That is what I recommend.