Not bad.
When you pick up (24 kg video) and put down (16 kg video) the bell, you are very much rounding your back - always treat the weight with respect.
For both, you look crisp - I would try for more hip involvement in both, and keeping your should packed better in your one-arm swing. BTW, it's always instructive to see both arms do 1-arm swings.
-S-
Hips should go back further, which means they'll go down further as well, and your knees will bend more, but your knees don't need to come forward more - just "sit back" more. Hammies are doing more of the work and hips less when your hips aren't as far back and down as they can be for maximum involvement.
-S-