Yes. I have tried to hit forehands like Rafa. It gives me lots of spin and power but I can’t control it as well as Rafa, so I go back to my crappy technique.
Generally hits like Rafael Nadal are less control and are very risky,but after years of training, he has developed big control!.
Disadvantage of this forehand hook is that head racquet became very stiff-the head of the racket becomes stiff with too much control, and the forehand resembles a shot like Connors or Borg.
Repeatability, breaking through to the other side of the net or defensive situations, this type of forehand is very good, but if you also want to play more attacking, this forehand is not suitable!!
Notice that with this forehand hook, the racket head is almost immobile!
In my opinion, you probably won't develop much when it comes to rotations and playing in matches!
However, if you want to improve your game, forget about the forehand hook, just close the shot without any hesitation, because in the video you don't allow the head of the racket to go behind the body (half-swing).
Hmm, it may also be that you want to do this forehand hook, you don't allow the head to move freely and you hit it halfway, your way of playing reminds me of old school tennis.
If you want, you can play like that, but if you want to play in a modern way, you have to change something.