If anyone can pull off the "Hollywood" vibe on a tickle vid, I think its going to be you, however, I don't think that aspect ratio will have any significant bearing on the overall quality of the video at all.
I would concentrate on the acting, build-up to the tickling, and the tickling itself. The more ticklish the girl(s), and the more genuine their predicament, the better your movie will be received.
If you think about it, you've probably never seen a post where some guy says: "The tickling was completely believable, and the bondage positions were truly inspired, but I had a hard time watching it because of that damned ASPECT RATIO."
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