Some very good advice already offered here. I’ll throw in some additional clips to support.
I find that your arm action resembles Alex White far more than Nolan Ryan, despite how you pull the hands down into a lower beginning position. White was a 2009 1st rounder throwing 95 out of NC. I don’t find your arm action that bad although I’ve no doubt some will disagree.
As best I can judge from a 30 fps video and limited camera angles your external rotation is around 20 to 30 degrees at touchdown. Perhaps you’re a little tardy due to your Lincecum dangle? If that’s what your trying here, ditch it, and keep the arm moving constantly from a higher set up… more like White’s. Perhaps you could work to load your scaps/arms in a plane more perpendicular to the spine…. that is, a little less downward action initially out of hand break… more of an active outward push than a passive drop.
How you unload your spine and other proximal areas is not so good as Coach Baker pointed out. As many are aware there are several studies out there, which found higher velocity throwers usually have greater forward trunk tilt along with more stride leg flexion through release. I’ve observed this to be true regardless of stride length, from long striders like Lincecum, and Chapman to more average strides like Verlander, Hernandez and Hochevar.
Here is another example.
Hard tell as your stride foot is sliding on the wood surface but it appears like your front leg is not bracing up and is continuing forward a bit after foot plant.
Of course these are consequences not causes so you’re going to have to back up and find out why you’re in a poor posture at release. Is it a strength deficit or a movement deficit… probably a little of both. I see some med balls lying around that basement torture chamber of yours so I’m sure you’re familiar with some of these.
I like the full body twisting slams the best. Doing these alone however, isn’t going to get you entirely there. All the side work is going to have to carry over into the delivery. Outside the costly expense of motion analysis, video and velocity checks of your delivery will let you know how much progress you’re making.
Finally, comparing models has many benefits and I do it often for various reasons. However, in the final analysis, the purpose of guided trial and error, deliberate practice, or meaningful play, is to discover your own uniqueness. No two great ones have ever looked identical. Good luck