The dude caught the ball. That's not enough? He has to maintain control through the entire process? Didn't he though? Looks like he caught it with one hand and had it the entire time. I must be missing something...
apparently if you go down on a catch, you have to have the ball in your hand when you get back up, or something like that.
what's an even bigger crock is that if you're running with the ball, once the ball crosses the end line into the endzone it's a touchdown, and it doesn't seem to matter where the player is or what happens to the ball immediately after it crosses
anyhow, here's a link with some interesting info:
https://lions.football-news-update.com/detroit-lions-loss-to-chicago-bears-calvin-johnsons-fault-not-referees/