To the untrained eye, these don't look bad.
You sneak a glimpse at yourself in the mirror on the way up in each of your reps, which will raise your chest. Consider doing your sets facing the other way to prevent the temptation. Is your toe angle out enough to facilitate the knees-out position? It's hard to tell from this view.
Above all, the time between reps needs to be significantly reduced. You're allowing yourself to become fatigued under the heavy load.