ja­son kott­ke: This is pos­si­bly the best th­ree-mi­nu­te de­mons­tra­ti­on of any­thing I've ever seen. De­rek Si­ve­rs ta­kes a shaky vi­deo of a lone dancing guy at a mu­sic fes­ti­val and turns it into a les­son about lea­der­ship. de­rek si­ve­rs: Lea­der­ship is …