VIDEO STREAMING NOT WORKING

HI

I HAVE A BROADBAND CONNECTION

EARLIE I USED SEE VIDEO ONLINE IN SITES LIKE GAMESPOT

BUT

NOW I CANNOT SEE THE VIDEO IN THESE SITES LIKE GAMESPOT
THE VIDEO AFTER BUFFERING IT DOES NOT RUN,IT STAYS IN
READY STATE

BUT I CAN SEE VIDEO STREAMING SOME OF SITES
BUT NOT ALL

PLEASE HELP WHAT IS THE PROBLEM