@cirix Squat:
It looks good! The only thing I might say (which I forget a lot too) is try to tighten your back more. You can do this by bringing your grip closer to your shoulders and then squeezing your elbows into your body - it will contract your back muscles as well as draw your arms directly underneath the bar. Chad Wesley Smith has some great "Pillars of Lifting" videos for form, and the squat ones were particularly helpful for me. I can link the playlist when I'm not on mobile if you want.
Also, it's kind of hard to tell, but at the top of your squat you seem to be leaning back a bit into your heel. That could just be because of your shoe (if it's not completely flat on the bottom it'll make you wobble a lot), but try to keep your weight on the middle of your foot, over your center of gravity. It'll keep you from losing your balance, as well as tightness in your back.
Deadlift:
Your initial setup looks great - you're sitting back, lowering your hips, bringing your shoulders away from your ears. But I noticed as the reps continued, you started to forget the setup. Remember, every time you pull, to sit back so your hips are below your knees, keep your back straight, and set your shoulders back and down. It might help to not peek at yourself in the mirror - when I do that I end up twisting my body and messing up my setup. Try to feel your hips go down, to the point that there's tension in your hamstrings before you even start to pull on the bar. And make sure you're driving through your feet - as if you're trying to push the floor apart underneath you. Your arms are just there to hold it, not lift it up. Let your legs do the work.
You look great other than those things though. Keep with it! Ankle mobility is a clutch for me too unfortunately. Once you get that sorted you can try going deeper in your squat, especially if you're thinking of competing sometime (which you obviously don't have to, just wondering what your goals are!).