I've had a few people tell me about that page, but there's not much I can do unfortunately. If they're not asking permission to post my videos (and they haven't / didn't), I doubt they would listen to me asking them to not post more of my work, especially videos I've yet to make public. All I can do is keeping making stuff and hope it doesn't affect my own numbers (but it probably is).
Thanks for letting me know, though.