@01:56My friend Guillaume (who also worked on the project with animation and design with me) and I did the sound sourselves. It's our voices. Glad you like it ^^
@02:07I'll copy-paste another comment I wrote before, just because it gets long to rewrite it everytime. I hope you don't mind.
Well, to do this, it's quite simple actually. But you need to use the right tools. The paper that worked best for us was canson half-tone paper. You need charcoal (use charcoal that's softer. you can even buy them as big chunks) and white chalk. You need A LOT of erasers. Don't go for fancy ones. White steadtler erasers will do just fine. Start by hanging your piece of paper on the wall. You'll need a camera with a tripod. Next, draw your first image on the paper. Once it's finished, take a picture. Erase the parts that are supposed to move (you might want to play a little bit elsewhere so the rest doesn't look static) and redraw them in their next position. Take another picture, etc. When you change shots you can change your paper. I think we used somewhere around 6 different pieces of paper. It's a long but fun process. It also gets dirty. If possible use a room that can be closed with a door and that serves no other purpose.