A better comparison would be videos produced by terrorist organizations which use 9/11 footage to promote their own views: that would be something I could see being argued for a ban.
I'm not saying it's right or wrong to ban host sites under certain conditions - I just think the analogy is just way too disparate to be viable.
Now imagine that the same unfounded rumors start and sites are barred from displaying the videos so people can "make up their own mind".
There will always be conspiracy theories but hiding the footage, IMHO, will increase it dramatically.
To be clear, it's terrible footage and I think it's good FB, Youtube, and other private sites are choosing to bar it from their platforms.
But I worry that in the long run, if you start doing things like banning any domain that hosts it, you'll feed into some of the worst elements of the internet.
No need for that, 4chan is a free for all. It's where I saw most ISIS execution videos.
There are specialized uses, but for most of us, I'm skeptical that it's important to have video of news events as they happen. If nobody caught 9/11 on video, what would be different?
For many years, no cameras were allowed in courtrooms or in Congress. It seems like that was fine?