Swimming is a great idea for you. I wish I could swim regularly. Always felt better when I had pool recovery sessions.
Update. Both of my knee is very sore the next day.
Looking at the video, i wonder if i jump too many times.
Especially when I was under the basket without access to the rim during 3on3. 80min jump session. I counted over 40 jumps. Each with at least 1min rest.
I've always been astounded that you jump so much on hard concrete and don't have worse knees. Any chance of using indoor court/synthetic track/grass for jumping now and again? Regardless, 40 jumps isn't excessively high volume, but surely they can't all be max effort jumps, simply because you'll get tired after 6-10 true max effort jumps. So if the aim is high quality maximal height jumps, you probably need to do less.
For me personally, i'm not astounded by it. I think if you're fairly lean, in good shape, and have a history of jumping on concrete; it shouldn't wreck you.
As for scoob's knees being sore afterwards, the amount of work he's putting in lately & his increasing the intensity of DJ's/drops is more likely to blame, I imagine.
Well, I only mentioned it because he said he had sore knees and wanted to at least throw it out there as a factor. But yeah, the bolded part is probably more relevant.
Also scoob, read this point:
I'll give one more example .. I was going to comment on this a few days ago but didn't, scoob gets lots of advice, and he absorbs all of it, then is often guilty of mixing it all together and it just becomes unmanageable. But anyway, on his depth jumps, you can see it looks like he's constantly shooting his feet into the ground upon landing, rather than simply landing. To me, this is another "mechanical override", that he's thinking about. It seems advantageous to lock the ankle upon falling, ie, dorsiflex on the way down, but, once that's done, the next step is simply landing soft while getting off the ground as fast as possible AND jumping as high as possible. When you shoot your feet into the ground, it kills the ability to land softly, imho. It could also be more stressful on the body itself, it's more of a punch than a push. If I want to do a rebounding plyometric pushup from low blocks, do I smash my hands into the ground, or do I land softly and immediately push as hard as possible? The latter.. same thing with a DJ. You don't smash your contact points into the ground .. you brace for a soft landing and then you explode .. This may look deceiving to the natural eye, so some people may perceive one is smashing the ground, but that's not at all what is happening. When I watch videos of people smashing their feet into the ground during drops etc, it actually bugs me. It's like they are trying to crush a venomous snake. IMHO, it alters motor patterns for the worse.
I noticed in your most recent video, you're bending at the knee mid-drop and almost anticipating the impact rather than reacting to it. It's minimising the SSC IMO. I know it probably 'feels' like you should project as much force into the ground and rebound, but it's not really the aim of the exercise as adarq says.
Also, on the kneeling exercises (~1:42 onward in the above vid), is that how you're supposed to do them? I don't do them, but I thought you have to initially jump straight out of the kneeling position, land and then jump up again. It's subtle, but it looks like you're rocking back onto your toes, jumping forward and then doing the rebound jump, if that makes sense. To me it looks odd, but maybe that's what your coach wants.