Hardware: We found that these movies did not play well on an Ultra 1 machine. This may be a memory issue.
Audio: You may need to adjust the audio on your machine to a comfortable level. (On Solaris machines type "audiotool" at the command line.)
Replay: If you would like to replay a section of the movie, note that there is a cursor at the bottom of the screen that you can drag forward or backward to change where you are in the movie.