why would i get strikes and claims if this channel is not is this guy lucky or does what he is doing fall under some kind of fair use ?
1) you can't tell who is monetizing a video
2) you can't tell whether a channel is in amazing standing or one strike away from being terminated
3) just because he isn't being caught doesn't mean he can't get caught. If a rights owner wants to take down a video they can.
Also where's the fun in reuploading videos others have made? Why not grow your audience with your own personality instead of throwing other people's videos on the wall hoping they stick? If you want to make money, get a job and earn it morally.
Your question is pretty much looking at someone who robbed a jewelry store but wasn't yet caught by police asking why you can't rob a store yourself.