duplicate

So I've been working on this channel of mine for about 6 years by now, never encountered too big issues. It's a video game focused channel with 90k subscribers, which means that every single video I upload is always different, thus being impossible to be "reused" or a "duplicate" to something me...

Hey everyone I was editing my playlists today and I noticed that one of them had two of the same video. I checked both, planning to delete one and both are exactly the same.. Same views, likes and comments but they're showing up as two separate videos. I'm scared that if I delete one, the other...