The reason I actually started my YouTube channel was so that my girlfriend could watch my videos while I'm not with her because she gets lonely. I would never curse in my videos for she is watching them and I'd like for her to see me as a good person. So my opinion is that if you want to then go ahead. If you're having a hard time not doing it here's another tip: Think about if a very important person is watching your videos and bases what they think about off of what kind of language you say. Is your language appropriate? Is it friendly? Those are always things that should go through your head whenever you're trying to make a friendlier video!
Honestly I think that profanity is pretty funny in videos but I want my channel to be family base while being funny at the same time (or at least I try to be funny). If there is profanity in my videos then I will tend to edit it out or just censor it.
Im afraid i do. I really cant help myself sometimes. I dont like to rage but a swear word doesnt really hurt in my opinion, as long as they dont occur too many times.