Well, it's not so much the videos themselves I was interested in, but the nature of the video client. I wanted to see if they used the stock flashplayer or something else as the embedded client. But sites that require you to go through a whole sign-up rigamarole just to check out their basic services (or other short-term use such as posting a single comment on a single blog post) extremely irritate me, so I'm not going there.
Not that I'm particularly interested in the concept anyway; it feels to me like a gimmick that would get very old very quickly, and mostly just distracts from the main content of the video itself. Perhaps if the comments were in a separate scrolling box on the side or something it would be better.
But then again I've found that my tastes generally run counter to the mainstream much of the time, so who am I to say?