Keep your head up on the descent and on the ascent you sort of want to pull your head back. Also, it doesn’t seem like you are using your glutes much when coming off the bottom. You want to push your heels through the ground when you come up, you will feel your glutes flex when you do it. You can furth increase glute activation by “spreading the floor” (Before you squat, plant your heels into the ground and force your knees outward, it will be like you are trying to spread the floor apart with your heels. Try to maintain this throughout your squat. When the weights get heavier this will become increasingly important as this will also prevent your knees from going inwards, which is bad for your knees). You hip/hamstring flexibility needs work as your back is rounding. You also seem to be consciously leaning forward, you don’t want to good morning the bar so keep your torso rigid and sit back rather than lean forward.
Hope this helps.
