If you want to easily embed videos in your Clearspace blog posts, documents, and discussions, we have two plugins that might be useful.
The YouTube macro lets you embed videos from YouTube, which is great for smaller videos. For longer videos (more than the 10 minute YouTube limit), we have a blip.tv plugin.
All of the videos on Jivespace use the blip.tv plugin. Here's an example in action:
I wanted to let everyone know that the Jivespace Video Podcasts are now available from iTunes. You can subscribe using the previous links or by searching for Jivespace within the iTunes store. The iTunes versions are slightly higher quality than watching through the embedded player, so they will look a little better, but they may take a while to download.