im afraid i have no idea(i can watch them as usual)..but since you get the fanpop error its a good idea to send an email.
make sure you give them as much information as possible aboot the error: when it started, what OS and browser you use, if it happens every time or just sometimes etc.
if the problem persists and you cant watch anything for days you might want to consider contacting one of the f4 directly. sometimes stuff gets lost in the queue of bug reports, inquiries etc.
i think its a good idea you asked other users first to see if its a general problem *salutes* so maybe someone else will comment having the same problem and that always helps to narrow it down. sorry i couldnt be more helpful..