OK, sorry. I didn't connect the dots. What I was trying to say is that I also have long arms and my elbows, I think, come too low too. For me, I believe it's what caused my shoulder problems, for you it may be elbows.
Anyway, I realized if I really pushed hard from my heels, my body went further up the bench and I was higher up on the back of my neck, once I was higher up on the back of my neck, my arms had less distance to go to my chest and my elbows didn't go past the bench on the bottom.
Again, not an expert, but it seems to me as if you being up on your toes are too bendy and moving around too much so your body is not staying up the bench and chest staying as high as possible on every rep. So perhaps some of your reps your elbows are going too low because of your setup not staying tight due to your feet flexing and that flex traveling up your body and perhaps causing your head to come up as your chest lowers a bit.
Could be utter crap. Everybody benches their own way. I just thought I'd throw that out as that's what struck me watching those videos.
I am Anton Zdravko Martin!
Best meet lifts: Sq 150 Kg (330 lb), Bench 120 Kg (264), DL 160 (352) @89 Kg (197)
Best gym lifts: Sq 375, Bench 280 (pause), DL 385 @205 or less
Goals beyond my wildest dreams, 600 Kg raw total, 200/160/240
Hack away at anything which isn't essential. Do what you love, and do it often. Fazc.
Everything competes for recovery so more assistance is not always the best idea. miked96