Fouetté it's a fairly standard (advanced) bowing term. It is pretty much the same an accented detaché but on the string (unlike an accented sautillé).
It is also called a "whipped stroke," by analogy with the classical ballet movement with the same name.
It is mostly used on up-bows, so presumably the "en tirant" is asking for it on a down bow. That would make sense from your image - the fouetté only applies to the dotted 32nd note before each trill, and by implication the trills themselves, on the off-beats, are meant to be up-bows.
There don't seem to be any YouTube videos, at least with English commentary. I found one in Spanish, but I don't speak that language.