Just tried it out. You need to --enable-gdata when you compile. And, you need to have gdata-sharp-core and gdata-sharp-youtube installed. That being said, they don't seem to be in Ubuntu repositories yet. I got them (and the rest of the Google API) from here:
http://code.google.com/p/google-gdata/source/checkout. I had to edit the Makefile to install to /usr, as my Mono install does not like things in /usr/local: will not install to GAC. I'm sure there is some easy way to fix that, but I'm too lazy. :)
Anyway, I haven't played with it too much yet. But, so far, it's looking good, Kevin. Nice work!