Out of the blue !
I was so wrong. I believed that someway the emulator did this but no. It's a guy the boy181, who shared the video on youtube, who is working on a mod of the game.
He told me he has two working roms and as he wants help he said he would share those to me, I send him a message, I'm waiting for his answer and may be a link to get the two files !
I'll test the mods and will share my feeling with him and here (if it's ok for him) and may be I'll make a video showing the mods, still if he's ok with it.
I'm very exciting by that news, really. Seriously I dreamed about this for years, nearly 20.
The result will be a surprise but I'm sure it will be very interesting and as the author said himself "This hack also runs very well on the real HW". Even if the hardware ask for mercy (hope I won't burn my n64, have to try with a normal one, not my precious rgb I have since 1999) on championship or multiplayer I think it will be very nice for time attack at least.