Here's some video of his team going up against one of the other top HS programs in Chicago at the moment, Morgan Park. Adam Miller is a SG for Morgan Park, and is #31 in the nation according to 247 with tons of Bluechip offers. Miller ended up with 31 points. Williams led his team (which seemed to have more talent depth) with 22 points in a victory for Bloom.
Williams is #11 and Miller is #44. The tall #2 for Bloom is the kid committed to Minnesota.
In the game it looks like Williams was playing more of a 2 guard role for his HS last year. You see a lot of him taking shots from the wing or finishing the fast break, but you don't see him taking the ball up and his team had issues with breaking the fullcourt trap when Morgan Park fell behind. He's got some good hands on the defensive end but still has room to improve as far as closing out on shooters beyond the arc. (He was matched up with Miller the entire game and Miller started to get hot from 3 pt range)
WIlliams has a nice shot, good athleticism, and he's able to finish around the basket. You don't see him shooting over anyone, but he seems like a good team player and lets the offense come to him without forcing anything. I have no idea what position his AAU coach had him playing at. It seems like he'd be able to defend the PG position better due to his size, but at least in this game he wasn't the facilitating PG for his offense. He was the scoring 2.