Can't add videos to favorite on youtube?

[Radoslav Milojevic]

Hi im person who like to listen music alot so i put it in my favorites i recently reached 2700 videos.When i add video to favorites it says it's added without any problems but when i look in favorites i can't see that video..I already tried to remove one video and readd it again it won't add..So i don't think so i reached max.I think problem was when i connected youtube acc to facebook acc and clicked on recent activity on profile when i recently added about 10videos they all desapear..I tried to disconnect it and than connect it again but same problems..And sorry for my bad grammar english is not my native language!And one more thing can some one tell me how i can contact youtube service via email?
youtube favorites link:http://www.youtube.com/playlist?list=FLX0WB9sXNKYU-lcfXrwR3eA