I like a lot of what I see here. Good work.
I just posted in another thread about how the kid was NOT short-arming but this pitcher is. German, you are keeping a really tight bend in your throwing arm as you wind up. Relax that, a bit. Don't over-exaggerate this and straighten it completely out. Just get it to somewhere around 90 degrees and so it feels right for you. It should feel looser and more relaxed. It's much too constricted right now. Again, don't go to the opposite extreme either. Somewhere in the middle. Look at video on this site of guys like Ryan, Clemens, Brown, etc., etc.
Also, you need to throw while over and on top of your front leg more. Right now, you're throwing from behind it. The issue the others mentioned about your landing on the throwing hand side, too closed is serious. Maybe if you landing in a better position, with more momentum sideways and thought "throw late" you might just get up where you need to be as you release.
Again, watch the videos of the pros.
You have some nice things going on there but you're being held back by these others. Keep up the good work.