The "REST Servers in Delphi XE" videos are now also on YouTube, and I've embedded them in this blog post for easier reference. They are below.
Notice that there is little time left to sign up for next week webinar, which will expand on the three videos and offer also a Live Q&A session (or actually 3 for different time zones). Again the main page with all links and information (and the white paper request form) is at: http://www.embarcadero.com/rad-in-action/datasnap-rest