Mourinho was under heavy pressure on Old Trafford a few weeks ago after the failed season.
The pressure seems to have calmed down when Manchester United gained some positive results, including a 2-1 win in Juventus mid-week.
He comes with Anthony Martial and Marcus Rashford as Juan Mata plays a free kick that has reached United in Turin.
The attacker, Romulus Lukaku, lost to Juventus an unclear injury whether he would be suitable for today's derby with Manchester City.
While Vidic knew that United had gone through a transitional phase in recent years, he believes things are now up there.
"It's very difficult," said Vidin Bein Sports.
"Of course we knew it would be very difficult for Sir Alex Ferguson to leave.
"He's got a lot of trophies and he's such a big man in this club.
"But we still expected, even if we did not get trophies to be much closer to trophies.
"I think in the last few games I like to be more positive, including Mourinho in the team selection.
"Martial, Rashford, Mata in front … It's quite attacking football.
"Good to see."
While Vidic sees positive results, Jermaine Jenas thinks Manchester United is still fighting.
"United Sir Alex does not concern today's United States and you can not see the current performance due to the success and style of the former team," Jenas wrote in the post office.
"This club is more like Liverpool in the nineties under Roy Evans and Gerard Houlliere, a team that adapted to the loss of character.
"Get the result against Juventus on Wednesday night, Jose Mourinho's masterclass and probably the best performance ever since he took over.
"It was classical Mourinho: no one gave him a chance, the crowd was against him, the one he played was proven better at Old Trafford, and many people wanted him to lose.
"He loves to play a villain, and he's still in his best situation when he must be a reactive coach who looks forward to the theft of the result rather than being overwhelmingly popular and asks to play extensive football.
"And there's United."