There are some problems here, but, geez, quit the moaning about how bad you are. You're trying to improve, which is great. You'll get nowhere with a mindset of "I'm tiny and weak, and I'm a motor moron, and my technique videos might be unwatchable, and maybe my post is illegible!" Seriously, stop all that.
Squat
- Basic problem is that you're in your knees too much with a too vertical back angle on the way down. Break at the hips and knees at the same time, and immediately point your nipples at the ground. This will help you get more forward lean—if you lean forward a bit more and keep the bar above your mid-foot, you'll also get your hips back and the weight out of your knees.
- The 'bounce' comes from having all of the muscles of the posterior chain at their max extensibility at the bottom of the squat. When you hit the bottom, you should feel everything is completely stretched out and tight. I think you need to take a slightly wider stance (heels at shoulder/hip width), turn your feet out more (30 deg), and focus on shoving your knees out harder on the way down.
- You could do with a couple inches more depth. Sort out the back angle and knees, and that might take care of itself.
- Your elbows are cranked up too high, which can contribute to spinal flexion. Check this out: The Elbow Problem | Jordan Feigenbaum
Deadlift
- Better to film this from the rear quarter like you did your squat so we can check out your stance and get a better look at your low back.
- It looks to me like on the FIRST REP you're following the right deadlift setup steps: you do a pretty good job of getting your back into extension (step 4: chest up!) but right after you do that, you breathe out and let everything go slightly slack before the pull. Breathe before you set your back, then set your back by squeezing your chest up, take all the slack out of the bar, and then pull the bar off the ground.
- On subsequent reps, you need to reset your back before each pull, which you're not doing at all here. After you put the bar down, repeat the sequence from the first rep: new breath, squeeze your chest up again, take all the slack out of the bar, and then pull off the ground. You're not fully in extension in any of the reps after the first.
- Don't look in the mirror. Turning your head 90 deg to the side in the middle of a heavy deadlift is a very bad idea.
- On the way down, you're breaking at the knees too early, which means that you have to swing the bar around them. The way down should be the opposite of the way up, so only break at the knees once the bar has passed them.
With a few tweaks, you can get these lifts where they need to be. Both of these videos look like reasonably light weight for you, especially the deadlift. Your YouTube descriptions say "I am a failure". Cut that shit out. The mental discipline of lifting weights is just as important as the physical, and there's no place for self-doubt. You could be doing a lot worse: these are on their way to decent.