First bit, SM'ed is high bar squatting, that depth is a lot easier to achieve while high bar squatting, even tight you would be able to get close to that with no problems sig.
Watch the second vid, you go to setup and your lower back is already rounded erode you started to lift the weight. I wasn't taking anything away from the lift, it just looked like you rushed in to the lift, as on your previous loft you lock in better and only start to lose the lower back part way through. For RM territory it's nothing major, but considering it looks like you have anther 15kg in the bag, it could have been tighter. Keep at it though