Originally Posted by psv255
Sorry for contributing to the derailment.
As for racquet drop, don't concern yourself with getting your elbow high.
A better image to keep in mind might be leading with the elbow; that would put your arm/racquet in a better position leading up to contact. At this point, looking at your first videos frame by frame, what's really hindering your racquet drop is that the elbow isn't coming forward before the hand&racquet (I guess this is "waiter's tray"?).
Can't tell how relaxed you are, but stay as loose as you possibly can.
I will try leading with the elbow more. Being relaxed is definitely key and something I struggle with.