We're having more and more people using video and audio files in WebCT. There have been a few issues with student computers reacting differently, and the files not working for some.
The methods of distributing video and audio that seem to work for all students are:
1: Put the file on the streaming server. You'll need to speak to the Learning Technology Development officer that works with your faculty. This is the best solution for video files as they are large, and there is limited space on the WebCT server.
2: Add the file as an attachment in a discussion message. The students can download the file from there and listen to it on their computer or portable media player.
3: Add the file to a .zip file (in Windows right click the file and select 'Send to > Compressed (zipped) folder) and make the file available from an Organiser Page, for example the Homepage. Putting the file in a .zip file means that WebCT won't get confused by the settings on different computers, and will allow the student to download the file before trying to run it.
4: If you don't mind (or like the idea of) files that you've created being available publicly, you could host video files on a video sharing site (e.g. YouTube) and link to them from WebCT. For example Professor Alexandra Juhasz of Pitzer College is using YouTube as a central part of one of her modules.