I've been taking Shotokan Karate for 7 years now -- I'm a shodan black belt, going nidan this year.
I have to say that you have a lot of things going right, but the guy doing the movements REALLY needs to be changed -- otherwise none of your audience will know what the hell is going on.
The kata, even though you say it's "Niseishi" looks so familar to a kata I know now -- and looking it up -- it is extremely similar to the Shotokan Kata that I had in mind: "Niju shiho." Just two different style variants of it, I assume.
Very cool flash animation, and I wish you the best.