WOW!
Look at that ARCH!
On video 1, you lose the lats/upper back on the last rep and your bar path goes off.
On video 2, it seems you lost your hips on rep 2-you can see a slight dip, and on rep 3 it was simply fatigue/hips/lats.
IT looks good for a heavy set. WE induce flaw through fatigue and this is what I see.
Work on improving there.
Good work overall.