I see a lot of good in your delivery. I particularly like your "equal & opposite" and your "hip & shoulder separation".
In the 1st video, your stride more to the throwing arm side and you might be starting on the middle of the rubber and these things seem to create some posture issues when your shoulders try to square to the target. In the 2nd and 3rd videos you seem to have cleaned that up - possibly by moving to the glove side of the rubber. I would recommend you stay on the glove side of the rubber.
Your glove control is fairly good except you might get a little soft with it and let if get a little outside of your torso. Strive to keep it in front to avoid having it pull your front shoulder open early.
Regarding your stride length possibly being too long, I don't see anything in any of the videos that would be cause for concern. Keep in mind that stride length is a result of other things in your delivery: how much momentum you create, how well you maintain a stable posture, how well you stay closed and rotate late, etc. Use stride length as an indicator of how well you do these other things but make doing these other things well your focus.
Finally, I am not a fan of the up-down-out front leg motion. Your center of mass has to stall over the back leg while the front leg does its thing. Then you have to get your center of mass moving forward while standing on one leg. That, to me, is a source of inconsistency. It also makes you slower to the plate. In the 2nd video, you appear to use the up-down-out motion and you also appear to have a late push-off/lunge. That will be a source of inconsistency if you can't repeat it pitch to pitch. I do think you need more momentum (as evidenced by the recoil/fall-back after release in the 2nd video) so I would want to see you get your hips moving forward sooner/faster and force the front leg to take a more direct path to foot plant. Consider using the NPA's Hershiser drill and Cross-over drill to practice this.