I saw the preview clip and what I saw made me come very close to buying it. It was a very good clip, or at least in my eyes it COULD have been very good. There were a few things that turned me off from this clip, but they are just my personal preference and I'm pretty positive there are a good number of people that feel differently.
The main thing that turned me off was her outfit (in the first picture). I agree that Katarina is a beautiful girl, but besides the fact that I am turned off by nylons and/or high heels, I think that particular get-up seemed kind of, well, whorish. I'm not calling her a *****, I don't even know the girl, but c'mon. Red nylons, high heels, and lingerie? No girl would wear that in real life (as comedian Dave Chappelle said, "That would be like if I walked around wearing a cop uniform."). Only in modeling and/or porn, and this falls into at least one if not both of those categories. I mean, that's just my personal preference, don't get me wrong, but I think it would have been better if you tied her up in a T-shirt and jeans than in that. As a corrollary, she looked very hot in the second and third picture. A bit more natural, you know what I mean? If a girl was really kidnapped and tickle tortured against her will, there is a chance she may find herself wearing that. But no girl would have ever been wearing the red nylons and high heels.
Also, I didn't see too much of the clip, but I think the tickling should have been more intense. It should be noted that I am sadistic and evil, but from the brief clip I saw, it seemed lighter than I would prefer, but that's just my own preference. It may also be because I saw about half a minute of tickling and could very well be wrong. But if you can make a longer clip, go for it (I'm a fan of "gauntlet" clips that run over 20 minutes), and really make things arduous for the ticklee. Hell, make her pee if you can (did I mention I'm sadistic and evil?).
There were a few awesome things about this clip too. First off, Katarina is beautiful. No doubt about that. Beautiful. The Red Devil thing is AWESOME!!!!! I can't tell if it stretches her arms slightly backward or not, but if it does then that makes her torso even more vulnerable than it already is, and if it doesn't then oh well. The thing spreads her legs open REALLY wide, and if you're not exploiting that by tickling her pussy and inner thighs, you should really start. I also like the black mask character, kinda like TIB. If you can expand on that, that would be a good idea. In my opinion, everything and everyone in the room except the ticklee should radiate a dark and creepy atmosphere. In a PERFECT tickling video anyway.
So anyway, those are my comments and suggestions. Take them for what they're worth. I forsee this becoming a top selling company in the future.