There's tons of incidents of videos getting taken down for ridiculous reason. Cody's Lab has been hit many times, his channel even shut down, over scientific stuff because someone got offended. Some people get copystriked just because they make a sequence of sounds on a paper towel dispenser that happens to sound too close to a copyrighted song.
Some guy even got his video removed and even dragged through the legal system because his cat moved his paw in a way that looked like the Hitler salute. Basically anything that can offend people, or be remotely slightly close to something copyrighted, it will often be removed. The thing that IS odd is how it's very hit and miss. I've seen videos of people dying and somehow that's ok, but then in another instance, it's not ok. They are very selective. You don't know of this because all those videos get taken down, but if you keep up with the scene you hear of all these crazy incidents.
Oh another fun one, EEVBlog tried to make a secondary channel, he named it EEV Discovery. Got immediately taken down because of copyright. The word discovery is apparently owned by Star Trek. He ended up being able to fight to get the channel back, but he's also a pretty big Youtuber. A small guy would stand no chance.
Then on the other side of the spectrum some people upload entire movies or songs and somehow it does not get removed. Yet I try to use a clip of a song as background music and it gets removed right away. It's really hit and miss.