I'm working on a physics video project, and I was just wondering if someone could look it over and make sure I did everything right.

The instructions were to find a movie clip and design two problems.

http://www.youtube.com/watch?v=9vb2f8HUoS8
This is my video. The problem I'm designing is "What is the acceleration due to gravity on Middle Earth?"

In the video it takes him 8 seconds to fall. He spins full body length 5 times, and through pausing and taking screen shots, I've determined that the entire tower is roughly 20 times his height. I looked up Christopher Ian's height online and found 6'5".

My math for the height of the video.

6(12)+5=77 inches. 77in(20)= 1540 inches 1540/12= 128.3 ft.

128.3 ft converted to meters is 39.1 m.

I then used to formula (change in distance)=(initial velocity)(time)+(1/2)(acceleration)(time squared)

I set the initial velocity as 0. 39.1=0x8+.5a(64)

I came up with 1.22 m/s.

Does it look like I did everything right on this problem?