Break the habit of getting your opponent/partner into a headlock + side control position. Since your top control is so high up on their body, your control over their posture is weak. Their legs are able to hook onto yours which will give them the opportunity to pull themselves into back mount position. Either know when to move out of that position right away when you fall into it, or give up that headlock hold altogether. Without chaining anything to it, it is a useless and dangerous position.
I noticed in certain bottom positions, you made parts of your body go limp. Under side control, you tend to feel overwhelmed with the weight of somebody on your chest, which as you know, any pressure on your chest has always triggered a stress reaction. Not just in Jiu-Jitsu. However, knowing when to relax, assess the situation, and being calm lets you work ways to escaping from the weaker position. You let your body physically relax, made very little effort to resist your partner's pressure, then at the right time, made explosive moves to scramble out of position.
At one point, you had someone take your back. Luckily, the hooks weren't in because this gave you the chance to roll them onto their back/side by applying pressure to their arm using the kimura grip. From there, you forgot that you could've gone to side control while still maintaining the kimura had you thrown your legs over them. Instead, if I can remember, you let go of the grip and scrambled for side control. Kimura grips `help apply pressure for many situations, even if you don't have full control over positioning. Once or twice you were able to roll reverse side mount control by applying the kimura from the bottom. Its a hold that can lead to devastating results.
Remember to keep your hips tight to their body. At times, you forget that small detail.
I'm still in the process of understanding the use of my feet and legs in this position. Just keep playing around with the hooks and grips. It's tricky and will take time to understand.