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:

Download or learn more about these plugins from Jivespace or visit our svn server to download the source and see how we did it!

If you are interested in writing your own plugin or macro for Clearspace, you can find plenty of information in our documentation space.