Youtube is in between a rock and a hard place as well as all user generated content sites.
Either they automate removing content and end up removing some of the good with the mountains of bad, or they do it manually which costs a fortune and is too slow.
The local news is still ridiculing Facebook because they left the stream up for the NZ shooting for hours and their stated reason "No one watching the video had reported it". Well what do we want facebook to do? Hire thousands of people to watch every single livestream live?
IMO we should all move to some kind of self hosting where there is no central mega corp that takes responsibility for the content. You host your own content and you stand behind it legally. As long as its legal content, you have no risk of being shut down.