That video was only for show (the practice was open to the media for 15min, what a coincidence), Mou and Pogba knew there was a camera out there so they started that small scene to trigger more rumours and speculation so that people forget that the team is playing like shit.

I don't think the match against Valencia will do much to the whole situation, if they lose, sure there's a crisis in the team, but I don't think they'll sack Mou...what are they gonna do after they fire him? hire an interim? I think the Man Utd board would rather take their chances and keep him for a few months than hiring an inexperienced manager because, like I keep saying, there aren't many 'top managers' looking for a job right now.