you can turn videos around with virtualdub, and its free
http://fcchandler.home.comcast.net/stable/
Just drag the video into virtualdub, then click videotab, the click filters tab, then click ADD and scroll down through all the functions, until you see totate.
You will also have to compress the video with your chosen video codec, and also choose MPEG layer 3 for your sound, to keep the file size small.
regards
CP.