On your squat, are you wearing "running shoes?" I ask because you seem to lean forward both at the set position and as you start the movement. If you are leaning forward and not dropping back, you risk a lot of lower back pressure as you add weights. Sitting back, and not leaning forward is one of the hardest things at the beginning. On the positive side, you have good depth and tempo.
On the DL, your lifts are not consistent so it is harder to give feedback. However, you movement is not in synch. Sometimes your hips lead, sometimes your shoulders. You made to work on just going thru your set up and start at a light weight a s a drill to get in synch.
That is my 2 cents, some of the other folks like Jane or BLZ may be able to spot more and offer better advice.