problems with watching youtube music video

[ivich]

HI,

I have the following problem: I use SMTUBE to watch youtube videos. I watched mostly various documentary movies that past 1, 2 hours and the smplayer works very well , i can jump forward, backward along the length of the movie without any problem.But when I try to watch some music video ( that last a couple of minutes ) the video stops playing , or the picture freezes , or the cach fill doesn't approach 100%. It happens every time .Actually, I can't watch any music video.
Where does this problem come from ?
thank you in advanced

[rvm]

I don't have any problem to watch music videos.

[ivich]