Pogba, another player questioned in that meeting, appeared to hit out at Mourinho's tactics following United's 1-1 draw with Wolves at Old Trafford.
Last month, Jose Mouringo became the favourite to be the first Premier League manager sacked at 5/1, with Sky Bet placing the likes of Leicester City manager Claude Puel and Cardiff City boss Neil Warnock below the 55-year-old.
Witness the tense exchange between Mourinho and Paul Pogba on the training pitch on Wednesday, the day after United's Carabao Cup exit at home against Championship side Derby County.
Mourinho is also at odds with Eric Bailly, the Ivory Coast global who is no longer first choice.
Then, the Brazil worldwide featured on the video posted on social media that has landed Pogba in trouble with Mourinho.
While watching the game, the midfielder recorded an Instagram video which showed him laughing and joking with team-mates Luke Shaw and Andreas Pereira.
Pogba told his new club's official website: "I chose Tours, because in the different interviews I had with all the interested clubs, only the leaders of Tours understood me and convinced me to join their project".
A source close to Pogba's agent, Mino Raiola, has further revealed that Mourinho has already lost his greatest asset in the dressing room - the very ability to "cajole, read, and relate to his players".
Pogba previously played in the Scottish Premiership with Partick Thistle, in League One with Crawley Town and in Serie B with Pescara. "We've see what Pogba is as a player".
Senior squad members like Ashley Young and Nemanja Matic have distanced themselves from Pogba and so too, surprisingly, has Romelu Lukaku. This all depends on who the board trust more, Mourinho or Pogba.