doesn't do anything

everytime I try to load a video it never loads and just stays on the buffer screen :(
UPDAT: Sorry but I know now why the auto play add on won't work on some servers, it does not work onthe .ru serer of kiss anime but does work on the.ac server, if anyone else is having the same trouble on the .ru server, simply just change it to the kissanime.ac server and should work, but not all animes are there so sorry for that :P