You can compare 2 Youtubes of tennis strokes frame-by-frame and one above the other in this post. If you want to do it let me know and I'll search for some of my earlier posts on comparing strokes. Compare videos with similar camera views for best accuracy. If you have a model 2HBH player, search a video and post it under your video. You can post a total of 5 videos in a forum post.
To single frame on Youtube, stop video, use the period & comma keys.
I have not studied 2 hand backhands.
I looked only at how closed your racket face was just before impact for some backhands.
The racket face looked neutral. I'm sure it should be closed. Look at ATP 2HBHs from the side camera view and estimate how closed the ATP 2HBHs are. 6-10 d. ?
You have the Tennisspeed reference, Post #4, I use for the tilt of the racket face for forehands just before impact. That is ideal - for what you want to understand also for 2HBHs and the tilt of your racket face.
One objective I have is to get forum readers started analyzing their own strokes by observing differences between their strokes and ATP player's strokes, one above the other. Be glad to answer questions and discuss some of the differences that you observe.
2HBH
OP analysis
"For backhand, I try to look at Djokovic as an example. My backhand in this case, if you slow down the video to 0.25x speed, you'd see my contact points were on the side of the body instead of the front, and my hands were close to my body/waist when I swing at the ball, I think that prevents me from having a contact point away and in front of my body. I also just swing too late at the ball too. To fix that, I plan to extend my arms as far back as possible so that when I swing I'd be forced to hit the ball away and out front. I could implement similar strategy for my forehand too. What do you think?"
Agree on impact locations.
guang2024 clip 25 sec, near Impact, Upper arms close to sides, angled down at shoulders, shortens radius out from spine rotation axis=reduces RHS, total rotation uppermost body, start to impact, estimate X degrees
Djokovic clip 5 sec, 1frame Before Impact, Upper arms angled out at shoulders, lengthens radius out from spine rotation axis=increases RHS, total rotation uppermost body, start to impact, estimate 2X degrees. In other words, Djokovic has estimated twice the uppermost body turn angle that you do. He is exceptionally flexible.
The uppermost body turn is an important source of RHS. It also affects aim in the azmithal direction (side to side aim).
Look at how far out Djokovic's upper arms are in typical 2HBHs. You said "I plan to extend my arms as far back as possible so that when I swing I'd be forced to hit the ball away and out front." See what ATP players do, avoid adding new sub-motions that you invent and or changing sub-motions that you see in the ATP. There are a limited number of similar sub-motions in use in the ATP. Sub-motions are usually used in matching sets.
I have not studied legs & hip sub-motions and variety for ATP 2HBHs or forehands. You need to do that. I have not studied separation on 2HBHs and variety, you need to do that. Image the line between Djokovic's 2 shoulders and the line between Djokovic's 2 hips. Imagine viewing these two lines from above. They would form the separation angle, a measure of the twisting and untwisting of the upper body resulting in uppermost body turn (line between the 2 shoulders). The two lines move independently and certain abdominal muscles stretch. When you watch TV tournaments, watch the line between the 2 shoulders turn back & forward. That shows better from high camera angles and ideally from a rare overhead camera.
Since uppermost body turn is very important for 2HBH and especially for your aim, maybe you should continue thinking about what you are seeing and look at some other ATP players for variety. If you look at 10 ATP player's 2HBHs and 8 of 10 use a certain set of sub-motions, you have a 2024 2HBH model stroke. I think Murray and some others may use a straight arm triangle 2HBH.
(I just looked at several 2HBHs and some of them might be using a 'chest press' sub-motion where the front arm has the chest press on the upper arm, similar to a baseball batter. See videos. I don't want to study 2HBHs............. your upper arms were down and that eliminates 'chest press' )
WARNING - Djokovic is conditioned and his flexibility is exceptional, so use him as a guide for excellent technique, but limit what you do for safety.
Examine your body flexibility and ranges of motion. Look into conditioning for safety.
