Well I have noticed that his shots always go further in his driving bay testing than actual playing. How many times has he really smashed 300 yard drives on camera? He doesn't really out drive the pro's that he plays with. Frequently short of them. if he really drives it 300 yards out, he would occasionally out drive those guys. They often play from the white tees as well. A lot of what he does is marketing, and he's done it well for a youtuber. On the other hand he never presents himself as an awesome golfer though. You often can see how when he plays with some other pro's who are real good, they truly out class him. And most of the time it seems his long game is not as good as it should be for a pro. So they play alot of front tees. You see a lot of drive and then 150 into the green sequences. That said, I don't really mind. He's a teaching pro and obviously wasn't good enough to survive on tour if he ever tried. And he normally seems to be a better golfer anyway judging by his tournament performances. I really wish Tommy Fleetwood would have a youtube channel but then he probably wouldn't be very good at golf anymore. On a pro level that is.
in England the white tees are the back tees the normal tees are yellow!
I would imagine the regular 300 yard drives on his range are more to do with the settings on the launch monitor.
According to many I've been on,(especially when they want to sell a club) I can crash a drive 240/250 but in reality, if I actually reach the 200 yard then I feel ecstatic.