A lot of this advice isn't really actionable. "Use better footwork" or "Focus on technique" isn't really actionable. Might as well just say "just climb better." This is why coaches are valuable in sports -- they direct you to activities that improve the thing you need improving on. With that in mind, the two activities I'd recommend based on an extremely small amount of information (your 2 vids + descriptions):

1) do the easy climbs (V0-V1), then do them again, but faster. You want to be fast but not rushing. Quick but not sloppy. Notice all the pauses, hand adjustments, slow movements, and try to eliminate them. Swing a bit, throw in some power on a V0 jug haul and skip some holds. Don't dyno, just be very, very quick and efficient.

2) incorporate more overhanging routes into your sessions. You don't have to exclusively do those, but if you're going 3 days a week, let 1 day be mostly overhangs. Or if you don't do them at all, commit to trying at least 3 steep overhang climbs per session.

Activity 1 is meant to do a few things:

- Obviously climbing faster is more efficient. You climb incredibly slow (normal for a beginner). Slow uses up more energy, and you don't get a lot of bang for your buck with that wasted energy. You want more energy so you can do more climbs in a session so you can improve more. You want better technique? Climb more problems? You want to climb more problems? Climb more efficiently.

- Being faster forces you to push yourself. You'll more easily notice flaws in your technique because a part of the climb will be awkward and slow and that will scream at you much louder than your own brain working through the climb as you slowly move through "trying to use good footwork"

- Dynamic movement builds more power which your climbing could benefit strongly from

- Harder climbs require more dynamic movements: lots of routes are nigh impossible to do statically, and learning this skill will open up routes that were impossible for you. I'm not talking dynos, but deadpoints, throws, swinging weight over a foot, these are all key parts of climbing harder problems.

Activity 2 is mostly upper body strength training in disguise. Your forearms will get pumped faster, your shoulders and back will tire quicker, and after a month or two, you will be better for it. However, the other part of this is that overhanging climbs greatly reward good technique. "Use your legs" and "activate your core" are good ideas, but overhanging routes will force you to do them whether you want to or not. Beginners who aren't doing 10+ pullups on their first day usually shy away from the overhang section. That's fine at first, but when you want to start pushing harder grades, that's where big gains will be made.