I am getting a -50 error when trying to implement the sample.
It appears to be an issue with the assignment of the movie to the texture. Are other people getting this?
I did rescale the QT movie to 256x256 and adjusted it in the script to match the dimensions. Still getting the error. I was also getting an error relating to a absolute path on Franks mac.
-- I think it's probably not finding your movie. Edit TexturePlayback.cs and change the path in the call to SetMovie to refer to your movie's location.
On the Mac this might be /Users/You/Movies/movie.mov. On the PC this might be c:\\Documents and Settings\\You\\Desktop/movie.mov.