For the uninitiated, let's be sure everyone understands that the video is of NFL football. I have no real idea about NFL rules, but, I do believe they have rules regarding catch/recovery of a fumbled ball that are related to "time of game."
The NCAA also has rules related to the catch/recovery of a fumble. To distinguish from the NFL, for NCAA, those rules only apply to Team A on 4th down or during tries (and before a change of team possession, regardless of time of game). So, if Team B gets possession of a ball and it remains alive, there are no special rules regarding catch/recovery of a subsequent fumble by Team B. Yes, there is a rule about a forward fumble out-of-bounds that applies to both teams, at all times (ball returned to the spot of the fumble). But the catch/recovery of a fumble rule only applies to Team A, and only on 4th downs and tries, and before a change of team possession (for Team A, only the fumbler may advance ball; dead where caught/recovered by any other A player; ball placed where caught/recovered by any other A player if behind the spot of the fumble; ball returned to the spot of the fumble if caught/recovered by any other A player beyond the spot of the fumble).
So, in the down in question, that would have been a TD in an NCAA game.
This is the aggravating thing about rule differences between the NCAA and the NFL. Folks may see something during one type of game, and see it ruled (correctly) one way, then it happens in the other type of game, and it gets ruled differently, and the spectators/viewers think the officials screwed it up (especially the TV 'talent'). That is one good thing about having rules experts in the booth these days, to give the correct explanation. But, that's just the way it is. We live with it.
Robert