:/ Hmm, I'm not sure how anyone can steal art work from a video. Guess I can't leave that all up to my imagination. All I know is that I just put in the description and video of your name and art piece and that all the credit and thanks go to who had let me show it off (you, in this case). I only have a normal You tube license so there aren't exclusive copyrights for images. Just censorship there. I'm pretty sure no one can steal it from a video.
Well, it depends on the resolution. If it's high enough, they can do a screen capture and use it that way. It happened to me before. But if it's on you tube, that's fine. No problem, then.