Today I just watched a my fav youtubes first video by accident. A swearword popped at me and my mum was in the room. He doesent swear in later vids. Im crying now :,( .

Use headphones.

That sounds like a bit of a predicament! Perhaps you should discuss the situation with your mother, since ultimately she's the one that can allow that. This doesn't seem like a discussion about something in particular that inspires you though, so it's not a good fit for the forum. (See the guidelines for this forum.) Best of luck with resolving this issue, but the forums just aren't a good place to seek advice on this sort of thing, sorry.