their wrist is not snapping forward. nobody is snapping their wrist forward except for amateurs with wrist injuries.
This is flat out NOT TRUE.
Have you ever seen Kendrick spank his FH ? Del Potro hit a duece court winner ? Nadal hit is BH ? How do you think he gets it back crosscourt from a closed stance ? IMO locking the wrist is what people did prior to the 80's when tennis was mostly a defensive game [except for the SVers Kramer, Gonzolaz, Ashe, etc].
Modern tennis more and more uses an educated wrist/forearm snap for power. Does Roddick look like he is locking his wrist ? Let it relax and use it the way one uses it on a serve.
All this, of course, is advice for good players with good coordination because all wrist/forearm movement takes good timing which is why it is prone to errors if not done well. Beginners and most ladies should just lay the wrist back and drive thru the ball.
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To the original poster ....
You video looks fine to me. Nice powerful FH there.
There is not just one way to hit it well.
Just look at all the varying styles on tour.
Soderling vs Murray vs Roddick vs Djokojic vs Santoro