Trying to watch films = buffering all the time

[Brandy1861]

Trying to watch prime or paramount films or even some programs is a real issue. It just keeps stopping wheel spins for ages, restarts then does it over andvover again. Got to point I can't watch anything unless using a memory stick to play videos. Speed check and broadband test says all OK but must be so.ething wrong when can't watch them surely! Any ideas or solutions please?