I finally got a chance to look at your videos. I think... if I were there I would be able to fix everything in an hour or two.
Did you learn the power clean from the top down? It looks like you have no power in your second pull at all. Your rack position looks okay, but your 2nd pull looks very slow. The weight is clearly not heavy for you but the neural drive/motor pathway is not there for power production. Did you start out with hang power cleans at all? Typically you want to work on the hang power clean starting at the power position and then working your way to the floor.
You are definitely using your arms after the second pull and that might be from a misunderstanding of what the power clean or second pull is. The second pull is a very short, very violent motion that is accomplished primarily by the posterior chain. Once you have transitioned to the power position, you literally jump/shrug the weight onto your shoulders. It is better to think of it as a throw rather than a "pull". The only duty of the arms is to guide the bar to your shoulders (elbows up!). The arms are not strong enough to truely power clean the weight. "Once the arms bend, the power ends." to quote Coach Burgener.
Go to the crossfit website, click on exercise demos/videos, look under the olympic lifts section, click on the burgener warm up, do that every work out. The Burgener warmup is snatch grip but the idea and the motor pathway will carry over to the clean. It is a warmup and a technical reinforcement all in one. I have a feeling once you get the hang of power cleans your neighbors below you are going to be pissed from all the jumping and stomping.
Also your squat looks okay except for one thing. You could definitely benefit from a "terribly useful block of wood". To allow the hamstring to assist the glute with hip extension the knee must not move forward or backward after 1/3 to 1/2 of the descent in the squat. Note that I did not say that it could not flex. The majority of the rest of the motion is in the hips. As the hips descend the pelvis must rotate anteriorly to maintain a constant back angle. Because the knees are not moving this stretches the hamstrings. This is where a tight core is necessary because if the back is not locked with enough force the hamstrings will force the back to round (pelvis rotates posteriorly while upper back angle is maintained). This is where the block of wood is useful. Get into your squat stance, put the block of wood directly in front of one of your feet (figure out what is comfortable. I prefer tips of knees over tips of toes, but going knees past toes is not a problem.), start your descent with both hips back and knees forward, adjust descent so that your knees touch the block at about half descent and weight is still on heels, maintain LIGHT knee contact with the block and sit down and back while rotating the hips to maintain back angle and balance. Dont forget to keep your knees out.
Hamstring assisted hip extension is an awkward motion if you have never done it before. It will feel unnatural. You may have to drop some weight to get the form down but once you get it you will be stronger due to more musculature assisting the lift. And have fun with rediculously sore hamstrings
Front squats look great. Press looks great. Bench looks okay but its hard to tell from that angle.