Frankly, I don't think the kid is really much different (if at all) from Mike Peplowski, who ultimately became a very good college player. I also don't see him being much different from that kid from Xavier in 2015 (can't remember his name) who was a double figure scorer and had a very nice game against Arizona's athletic, long front line. There have been a lot of players in college basketball over the years who have huge frames, are not super fast or agile, but have been able to use their bodies to create position and score. Big Country Reeves, Ostertag, and Cole Aldrich are all examples. I'm not saying Davis is as good as any of those guys, just that none of them were good athletes yet all used their size very effectively.
In our offense, if Davis has the hands everyone claims he does, he'll be fine. He's definitely no less agile than Doyle, and Doyle would have been fine in the pick and roll game if he could have simply caught the ball. Honestly, as a floor, Davis is probably Graham Brown, who was a solid player and probably would have been capable of scoring 8-10 a game in a good pick and roll offense.
I think Davis' biggest challenge will be defense. He doesn't seem very long, and it's doubtful he'll block many shots. I think he'll be a solid rebounder, though.
As far as the video, I'd have to know when it was taken (looks like at least a year old). He's lost a ton of weight and has improved his body a lot, so I'm not sure how relevant it is.
I'd also add he was a far superior high school player to Jordan Morgan, has two inches on him (at least), and J-Mo was a very solid player for us. So I'd say it's way too early to draw any firm conclusions.