I have to agree with what others were saying on here. I think that making sure you're uploading your own videos is the best thing that you can do. I know that YouTube is now cracking down on people because they don't want them uploading videos that are copyrighted. I know some people who have gotten into trouble for that, so be careful when you're uploading because you don't want to get banned for uploading something you didn't think was copyrighted.
Also beware of the audio track. I have seen videos getting banned just because they used a track from either a movie, a song or anything of that matter. YT at this point has pretty good algorithms to detect copyrighted videos/audio.. Do not try to be smarter than YT. Impossibru!