Atleast in Europe there is no fair use per-se (though it's complex and various stuff is exempted). The Twitter ToS merely says that if you upload something, it

Atleast in Europe there is no fair use per-se (though it's complex and various stuff is exempted). The Twitter ToS merely says that if you upload something, it's still yours and that Twitter gets a license to show others what you posted (otherwise it would be silly to upload)