Check out the Library's Movie Section on the site to view them. The WMVs have no sound and aren't indexed so you can't skim through them freely. Lots of people sitting and running around as usual with MMORPGs.
The Devil Buster system looks interesting because you have to try and convince them to join you before they'll be in your party. Fail to convince them then you're going to get attacked. Doesn't show anything about merging two Devils together, though.