I just posted a question about tagging photos.  That reminded me of a related topic.  Windows Photo Gallery says it tags AVIs as easily as JPGs.  How does that work?  I didn't think AVIs supported that kind of tagging.  Is it in an external database?

I have a bunch of home movies, all in AVI (DV) format.  With some help from previous posts, I think I can un-tangle them from my photos in Media Center.  It would be very cool if I could tag them as well -- AND Media Center would recognize the tags.  Is that possible?

Thanks!