Dupraz's rallying call was shown on French TV station Canal + with the footage quickly picked up on on social media and in the French press.
'You deserve to stay up. For two and a half months I have been saying that you will stay up,' he told his starstruck players.
'The problem is not whether or not I will look like an idiot, it is to see whether you have the mental, physical and technical capacity to do it.'
Clearly emotional and feeling every word he was saying, Dupraz then showed his players a video of their friends and family sending their messages of support.
The footage hit home, with TV footage showing Toulouse's players welling up at what they were seeing on the screen.
'Now the most important thing is what we are about to watch together,' Dupraz said before showing the video.
'Because here what we see is undeniable. What we will see are people that love you. What we will see are people waiting tonight to see you again.
'When you come back home tonight, they are waiting to hold you in their arms.'
After the video finishes, Dupraz then adds: 'At the end of the game, you will be heroes. And you will be responsible for keeping the club in Ligue 1.'
Clearly fired up by Dupraz before the game, Toulouse's players then went out and did the business on the field.
Needing to win away at mid-table Angers last weekend, Toulouse soon went 1-0 down and looked up against it as Billy Ketkeophomphone put the home side ahead with a 12th minute finish.
But after half-time Toulouse started to believe and Wissam Ben Yedder equalised to level the score just before the hour mark.
That wasn't the end of the drama though. Said Benrahma put Angers back ahead before Toulouse turned the game on its head.
Forward Martin Braithwaite and substitute Yann Bodiger struck in the final 12 minutes to seal a truly remarkable away win.
The three points on the road meant Toulouse stayed up by the skin of their teeth, eventually finishing just a single point above the relegation places.
It means another season in Ligue 1 is on the cards next year and while the players did what was needed on the field, much of the credit for their dramatic result clearly must go to Dupraz.
A career in motivational speaking may well be on the cards for him once he's done with management.
-Daily Mail