i have realplayer too. i know you can view this trailer with windows media player. i noticed it doesn't buffer to 100%. what does that mean?

are you sure the trailers aren't for real player as opposed to windows media player.
another thought is do you have "play videos in web pages" checked in internet options>advanced?

scottyd88,

Also, make sure that the movie trailer is not a Quicktime file.  A lot of movie trailers are only in that format, and you need Quicktime, from Apple.

 

my friend played the same trailer on their computer with windows media player. i think it has something to do with the buffering. its doesnt finish buffering