So thats my car/vid.  I saw that this thread was sending a decent bit of traffic to my video so I stop by to say hey.     
I'm 5'7" and 160lbs and fit great in the miata...haha.  My roomates are 6'2" and 6'3" but they can fit, its a tight squeeze for head and leg room though, especially with the top on.   
I agree the video isn't me doing crazy runs but thats because I still don't have all the bugs worked out of the car.  Like I don't have any sway bars at the moment and that makes the handling all sloppy and not confident inspiring.  Anyone that knows me would never say I'm a pussy driver, I normally go balls to the wall.   
I am going to a track day friday and will get some more exciting video then.