I think it's super misleading watching these highlights, but I can say as someone who has worked as a scout and for scouting services....
* Elite level footwork for his age, looks extremely comfortable and natural in the pocket, stays balanced consistently, looks the part
* Throws one of the most catchable balls you'll see in high school, makes it easy for his WR's and does this consistently
* Has one of the best deep ball's you will ever see scouting HS QB's. Fantastic deep ball accuracy and his launch angle is something you don't even see top level college QB's do. It makes it so rare to see DB's intercept or even get a hand on his deep balls. It drops in and when combined with his accuracy his deep ball already would be one of the dangerous traits in college football.
* Knows when to zip it and when not to - the arm strength question I'll also note below
Junior with loads of tape/experience, great technique and a natural athlete, etc.
This kid is going to put on weight, he has strong arm strength already but when you project a kid to college football you know certain things are going to improve naturally, like strength. When you have the fundamentals he already has, you can project out he'll have everything he needs in that category to do everything he wants to do. Will he be a guy like, say even Baker Mayfield, who can throw 70 yards? I have no idea. I also know that need may come up once in a career and I'm not going to sweat it.
Plays great comp with a very advanced system for HS, is able to progress through his reads, stays comfortable in the pocket, etc. etc.
From an on-field perspective, there is nothing this kid can't do. He has skills that already would be upper echelon in college today. He is going to continue and develop and that's why everyone is watering at the mouth thinking of him at 6'4/215.