Squat:
1) Raise the spotter arms 1 notch.
2) It looks like when you are getting your breath between each rep that you are kind of trying to stand tall or something and getting into a little bit of lumbar overextension, which is leading to things being a little too loose, as well as some lumbar flexion to compensate on some of the reps. When you get your breath in between reps, just stand normally. Don't move your body. Think about getting your breath in a way you would if someone was about to punch you in the stomach.
Deadlift:
Film from maybe 20 degrees in front of a direct side view next time. I want to see what your knees are doing. Its possible you need to push them out a little more at the bottom which usually helps set the back. Think about pushing your belly between your knees when you get your squeeze