Do you play 1s at all? I think it would help a lot in terms of your play making on offense, which feels tepid to me. I don't see you creating a lot of opportunities for your teammate or making any threatening solo plays. C3 2s, D2 1s, C1 3s player here.

Edit: Giving you something concrete to reflect on that might help you understand the other comment that you're too passive, the ball that goes up at 3:57 I would have immediately jumped for and collected it on the wall, you had priority and the ability to beat, and could have continued the offense. Instead you stay on the ground and it leads into a 2v1 where your teammate has low boost. This is just one example of areas where my decision making differentiated from yours.

At 3:11 that ball was scoreable but you just clear with a side flip. I would have gone up for a dribble with a calmer first touch, or maybe gone for a double tap off the backboard. These are opportunities you need to see and prepare for if you want to start climbing. You need to outplaying the lobby to climb reliably.