Good effort! Thank you for the chance to hear you play again.
There is at least one other recording of this on the forum, you might enjoy that one. Look for a post by Francos, I can't recall whether it was a video or an MP3.
Just one observation, it might be the camera angle but you seem to be playing with a slight forward bend to your thumb and playing in towards your palm. That might be a source of future tension. This video http://www.youtube.com/watch?v=oPfZVflJdp0
was mentioned recently in relation to the left thumb, but take a look at how John Williams uses his right thumb, about 50 seconds into the video you get a very good view.
Try using the advanced search option to find "right thumb" in topic titles/first posts and you'll find a lot to read,
Best wishes, V
"There are only two things worth aiming for, good music and a clean conscience." Paul Hindemith