You're right !
I have made this morning (ok i'm a little late ! ) for 3 techniques of quadload. And yes, when i'm starting last year i have also found a lot of video. But after one year of practice i can consitly reload 8 shells under 3 seconds in match.
The video, en français je vous pris ! https://youtu.be/9ZwYUfDVbDo