Squat looks decent enough. Like lift206 said, work on your tightness. Pull the bar down into your shoulders and pull your elbows under the bar. Squeeze your butt and take you air and squeeze down on everything. Drive your head back into the bar and slow your descent a bit to maintain that tightness better. Coming up, pull your elbows forward and lead with your chest.
I'd recommend prioritising one style of deadlift to start with and get good at that. When you can reliably pull well in that style at max weights, then start learning the opposite style. IMO trying to learn both at the same time will just slow your progress. Which style is up to you, but I would probably start with conventional because it is less technical.
For your conventional pull, focus on getting your setup just right. If you do that and work on holding position at the start the rest will largely follow. Drop your hips a tiny bit more; your knees will drift over a bar a little, but that's fine. Pull the bar into your shins and your shoulders behind the bar. Point the base of your ribcage at the floor without letting your hips rise. That will bring your chest up and straighten or even arch your back. Keep pulling the bar into your shins. Push hard and fast off the floor (even think of pushing the floor away) keeping that back angle and your shoulders behind the bar while pulling the bar back into yourself. Once the bar is moving, then push your hips through but always keep your shoulders behind the bar and focus on pulling back rather than up. You'll be a bit slower off the floor but your pulls will most likely feel much smoother once you're accustomed to this technique.