Thanks for the upload. It's not often we get a good quality d1 vid here on tt.
nice hitting. mind if i offer a little tip for you on your fh?
what you are doing now is 100% fine. looks great.
But here's something that should give your more power:
when you swing currently you are rotating your torso all the way around at the same speed. that's ok. no problems with that. but you will find you will get more power if you start your kinetic chain and when you rotate, slow down or almost stop your rotating when your chest faces straight ahead. this will fling your arm through faster. ... and then finish rotating after contact. this change in speed will cause all of the energy to go to your arm for faster swing speed.
take a look at these vids. notice how fed rotates, slows way down on rotation when chest is pointing straight ahead, racquet is whipped around and then he finishes.
http://www.youtube.com/watch?v=20cfdNS0DMs&t=1m33s
http://www.youtube.com/watch?v=b_XamJSLzq0&&t=3m12s
nadal:
http://www.youtube.com/watch?v=tjjXi5tBZ7I
If you look at your d1 hitting partner in the video he is doing this also (the slowing of rotation when square).
thanks
edit: watched it again. one thing is you are not using your rear leg effectively. sometimes you 'hop' up but you are not pushing off in the best way. you need to get some more weight on your right leg and push off w/ purpose. look at the d1 guy. he's exploding off his rear leg. u can see the energy going up thru his body.
also previously mentioned: you have no split step.
and... you are not using your left arm properly. u stick it out parallel to the baseline which is good but you are not 'using' it.
look at this sequence here between the two of you. notice the difference in left arm usage? d1 has it right.
http://www.youtube.com/watch?v=Ds3-UYaxBJ8&hd=1&t=5m34s