If you want to view one of the Chance Lectures locally, for example, the video called "Risky Business", click on "Risky Business" and a compressed folder called HAMMON.zip will be downloaded. Decompressed this will produce a folder called HAMMON. Then click on the file "HAMMON.rm" in this folder and the video will start.
After the first slide turns up you will need to resize its window and position it so that both the slide and the video are visible.