Feel lucky, this is my 200th review you're getting
I don't know French, so I'll write this in my mother tongue of English. Hope you'll understand. ;^^
I'm sorry but using the Tonari no Totoro theme is not fitting to this at all. It's a recognizable song to a classic movie that has no obvious or apparent connection with the visuals I saw here. As a Totoro and Miyazaki fan I'm slighted.
I can see you gave much effort, I won't fault you for that. But I'd still work just a little bit harder on drawing people, thier heads were not symmetically shaped (one eye slightly bigger than the other, etc. ) This problem of poor facial symmetry is common among internet "anime" artists, and you should work hard to overcome it.
Furthermore just because it's "anime" doesn't mean you have to draw the bodies so small in comparison to the heads. If you try to draw bigger bodies and longer limbs you may like the results.
Is "FaFart" an actual name? That has a very funny sound in English.
Viewers with slower processors will experience sync problems with the music, set it to "stream."
I'd suggest a change of music as well.