Hey @mawilbolou, I didn’t follow the tutorial but here’s what I came up with when I got to launch my PC. It’s super simple!
Here’s the Event Graph of the camera pawn:
The collapsed graph:
(IA is swizzled and negated)
And here’s the result:
Hope this helps! 
Incomplete in what aspect 
The tutorial’s not from a full project series. I think his tutorials are one of the best 