Picking analysis and understanding technique

Hello! I had a bit of a break since I was last on the site due to a hand injury. The hand is all healed, so I decided to take the opportunity to come back online, and start fresh. I’m trying to understand which picking style I’m using to help point me in a direction to begin the journey again. Attached are two videos: one of me playing 3-notes per string, and the other of a tremolo. (Not the cleanest technically, but warts and all is probably a good place to start!). I think I’m USX, but maybe the tremolo is DSX? I feel like I have strengths and weaknesses using either technique to achieve speed; neither one feels fluent, but this could be simply a matter of putting in reps.