I never did really pay attention to behind the scenes commentary stuff from Star Trek actors. Clicked myself through quite a bit of Shatner stuff going from the one you posted originally.
To be honest I always prejudiced William Shatner to be a douche. After seeing what a great sense of humor he displays and how he is able to not take himself all too serious, I stand corrected. Actually got to like the guy quite a bit.
Especially after seeing this. ^_^