Videos are really not your answer. If you goal is to compete as a professional in the World Long Ball, those guys are launching their balls over 140 plus and the winners 150+ with balls speed 200+. They are consistently 400 yards +. Also think you would need someone who could help you with physical conditioning. I would search on google, see who the competitors are, if there are any in your area and try to make contact with them.
See what it takes to get to that level. Check with PGA Teaching Instructors in your area to see what the recommend. Bryson finished second this year in one the events and you see how much he bulked up and how hard he swings at the ball. Hitting in the longball contest is about distance as well as accuracy. It has to land within a fifty yard wide area, unless it has changed. Tried it years ago before it became a professional sport.

I recommend Chris Upham, the PGA Pro in the Fairfax, Virginia PGA Tour Superstore. He used to compete in the LDA and minor golf tours when he was younger. He has been able to get my 14 and 16 year old sons swinging into the 100 mph.

Another recommendation would be to locate Kelly Murray. Yes, the same Kelly Murray who competed in The Big Break and in LDA My oldest son was friends with his son and got a couple of lessons specifically for hitting the driver long. He used to live in our area and now splits his time between Florida and Canada.

Sean Fister, better know as the Beast has competed a number of years in long drive and a multiple winner. I am giving you his sites to read and maybe you can contact him. He lives here in Mt Pleasant, SC where I live. Very impressive. Have met him at a local celebrity golf tournament that I have been working for many years. Club head swing 150mph. He is now teaching out of the Dustin Johnson Golf School at the TPC at Murrells Inlet, SC.

www.prolongdrive.com/.../

www.myrtlebeachgolfdirectors.com/.../

Thank you Chuck and Neil for the info I’ll be looking into everything I can to see what I can learn and who I can get in touch with to help me keep pushing my speed! Appreciate it!

Bryson has said that he did damage his body putting on the extra weight etc just to hit it flat out