tcf15, thanks for the clips.
OkaForPrez is right that the best angle to see this is the one from the UConn baseline with Boat and Chiozza running right at the camera. The one above doesn't have the first head snap so I'd have to go to the game replay and look at all the replays to see but the one in tcf15's earlier clip clearly shows Boat didn't touch Chiozza on the first head snap. Look where Boat's left arm is when Chiozza snaps his head back. It's in front of him, not at his side. And there's clearly space between Boat and Chiozza so it wasn't Boat's body that made contact with Chiozza.
On the second head snap where the foul was called it looks like Boat went to change direction and did make contact with Chiozza. But Boat's arm only comes up after the contact where it looks like he does this to gain balance so he didn't fall since his body changed direction from going towards his left to being forced back to the sideline from the contact. I guess that probably was a foul since Boat did initiate the contact from his change of direction.
Whatever, it wasn't a big play during the game and UConn won so I don't want to belabor the point any more.