Edit: Ah..., ignore what I said before...
There are plenty of compilation channels that do not seem to have problems, I look at big fornite channels they now mostly all say they have permission from the owners of the clips and often have user submitted clips. It's not about giving people credit, it's about getting permission from them or knowing that you have permission. Some of those fortnite channels did not seem to have permission before but I think were given permission because they promote the channels in the clips. Video games are copyrighted but mostly the companies behind them are not going to exercise that right to remove videos because most content helps to promote their game and drive sales. I have seen seen a gaming channel terminated by the company behind the game though for repeatedly promoting breaking rules in the game, so copyright infringement is a grey area that kinda depends on your relationship with the content owner.(just from my experience)
