You have to stride WAY further. I don't see an issue with the tilt, but you will have a hard time generating much velocity or movement with that weak stride. He sets himself up for a lot of momentum with a big leg kick then completely dissipates it by just setting his front foot down. To me it looks like a guy still uncomfortable with sidearm, as the movement to the plate is tentative and very upright. Look at the landing foot, it lands heel-to-toe. That food should be way further towards the plate and landing flat - not heel or toe first. EXPLODE to the plate just like any other pitcher. Keep that front hip closed moving towards the plate then aggressively open those hips and drive your sternum right at the catchers mitt.
Also, the arm cock is in a weird position. His elbow almost rotates behind him towards the catcher before "uncoiling" to start the throw. To me, this looks like an unhealthy movement. I think the more standard "W" shape at that point is the healthier look.
I had a successful career in college throwing from a similar arm angle in college. I will private message you a few pictures of myself for comparison.