That jump stretch video is really interesting. Any ideas on how cutting off the blood flow to the shoulder like that helps loosen it up? I've got one of the jumpstretch compression bands in the post so I'm going to try it once it gets here, so will report back on its efficacy.
There's another video where he wraps the wrist up with a jumpstretch band - I tried this myself using a climbing sling, wrapping it tight round the wrist then doing some circles etc. When you take the sling off and the blood rushes back in, it feels amazing. This sorted out my sore wrist in about 2 days. I've had problems with it for years, including a ganglion at one stage, and this is the only thing that has ever made any difference. I don't get any soreness now - planches, cleans, thrusters, they're all fine. So I'm hoping it will do the same for my shoulders!