Last night French electro-pop dance-storm Yelle showed up and rocked the Knitting Factory. We weren't there, but this video shot by occasional Stereogum photographer Abbey Braden for 'Sup offers a pretty good idea of the night's festivities. [videoembed size="full_width" alignment="center"][/videoembed] Tecktonik. Definitely "A Cause Des Garçons," or at least a cause for celebration. Yeah, we know no French. But we ...