Hi Edje!
The inspiration for the videos generally come from the music, some songs I listen to on my own, others I come across but they all make me curious what theme they are about, and so I try to express it. When it comes to youtube, I just throw it out there and they do the age restricted and copyright claims. I haven't put any commericals on the videos but I can imagine youtube has done so on all the copyright claims. I don't make any money whatsoever, it's just for fun :)