What makes a catch?

[JugglingReferee]

Just saw the full speed version. It is still a TD.

He has the ball firmly in his grip while both feet are touching the ground. The player then knocks the ball out of his hands.

The fact that player didn't do a "football move" should be immaterial. Who is the NFL rules committee to sya what a football move is, unless of course, they had discussion and agreement amongst the 32 teams. Maybe that player likes to hang onto the ball with outstretched arms, as a method of celebration after immediately having both feet touch the ground.

Maybe I don't agree with the NFL rule 100%, but that still doesn't change the fact that both of his feet are on the ground when the ball is in grasp of the player's two hands.