Can you help?

I am teaching a new course at my university; it is an audio/visual English class. This has never been taught before and there are no video tapes to use so I must find some. It has been suggested that I show a 15 minute documentary and then have a class discussion.

I have personally never seen such a short documentary and have no idea where I might find them. I am in Dalian China. I have thought that I might use regular movie videos and stop after 15 minutes and have a discussion.

Any help with finding documentaries of this length or suggestions would be greatly appreciated.

Wayne B. Ewell (USA)
Teaching in Dalian China