has overhauled United's preparation and coaching to such an extent he has had cameras installed at the club's Carrington training ground to monitor players' performances.Then he goes through the tape with them individually and collectively pointing out what they are doing wrong.It is all part of his process to make players "train with their brain" rather than their legs."I think it is a lot more detailed at the training ground," said Northern Ireland international defender Evans
Van Gaal has overhauled United's preparation and coaching to such an extent he has had cameras installed at the club's Carrington training ground to monitor players' performances.
Then he goes through the tape with them individually and collectively pointing out what they are doing wrong.
It is all part of his process to make players "train with their brain" rather than their legs.
"I think it is a lot more detailed at the training ground," said Northern Ireland international defender Evans. "They have spent thousands on it and a few of the lads have seen HD cameras around the pitch.
"We have this system at the minute where he can watch us on the pitch. I think a lot of teams use it but we are looking into it in quite a lot of detail.
"We have been watching and analysing videos of ourselves in defensive and attacking play and he has been telling us 'you can do this and that better'.
"There are things you are doing on the pitch - and the whole team will be feeling the same - and you are thinking 'am I in the right position?' Then he will show you in the video and you will know. We went through a tape last night and I was 10 yards out of position.
"I think it is new to every single player. We got a bit of that from the previous manager David Moyes last year - he looked at videos. But we are looking at things in more detail now. The case before was that as long as we got the results everything was fine."
Many 'old school' managers would argue that filling players brains with too much information can kill their natural spontaneity and instinct.
Evans might have agreed before Van Gaal's arrival fresh from guiding to Holland to third place in the World Cup.
"You don't want to lose your instinct and I think that is the case with a lot of footballers," he said. "Especially attacking players with flair, you don't want to take away their natural ability to score goals.
"Look at Wayne Rooney the other day [against Roma] and the way he bent one into the top corner and scored a fantastic goal out of nothing.
"There are times on the training pitch when you think 'am I in the right position here, it doesn't feel natural to me?'. But as time goes on you practice and with the repetition, it becomes natural.
"We are working on it a lot so it becomes second nature.
"The question is: do you lose that sort of thing by thinking too much? But I don't think you do. I don't think the manager thinks you can think enough.
"He said to us, 'you will find it hard'. Not so much the tactics and results but we would find it hard mentally because he is demanding and he wants us all to push ourselves to the limit.
"That is what it feels like. We are all going to bed and sleeping well anyway.
"He is demanding and he knows that himself. But that is the standard he has set for us. It is everything from the clothes you wear to the time you have a meal and everyone eating together which has all been well documented.
"There are a lot of fine details that we all have to stick to but I think what it does is give everyone a comfort because everyone knows 'right, that is the standard' and if anyone steps outside of the line even the other lads will be quick to help them out."
Van Gaal has warned it could take three months before the United players show the benefits of his coaching methods and philosophy, pointing to the slow starts made at all of his previous four clubs, Ajax, Barcelona, AZ Alkmaar and Bayern Munich.
Evans, 26, says his team-mates and him are determined to contradict the Dutchman, however, by making a flying start to the new season.
"It would be nice to prove him wrong," he said. "We want to be winning as soon as the opening game against Swansea comes round. We don't want to be thinking 'right three months now we are ready to go.'
"We want to be winning all our games. I think the manager is the same really - he wants to win every single game we play."
Making amends for last season's seventh place and failure to qualify for the Champions League is also a big incentive, says Evans, who became a father for the first time over the summer.
"It is a big motivation that people are saying Manchester United can't win the league," he said. "I think last year everyone hurt - the players, the fans - and I am sure David Moyes himself was hurting.
"It was a hard time to be a Manchester United player because the bar had been set high by so many great players before and you don't want to be that player or part of that team that didn't qualify for the Champions League. But it happened."
If the collective challenge for the team is to return to Europe's top table, then Evans' personal crusade is to nail down a place in the team with Van Gaal admitting he is looking to sign new defenders following the departures of experienced trio Rio Ferdinand, Nemanja Vidic and Patrice Evra.
"I am sure we will sign another centre-back or two but that is always the challenge [for the players] at Manchester United," said Evans.
"I think I have benefited playing with Rio and Nemanja for a long time and Wes Brown before that. I've learned a lot and this is a big time in my career now."
With 'Big Brother' watching, Evans knows there can be no slacking off.