This is the third mount run video. Zul'Gurub is a 20-man level 60 raid located in north-western Stranglethorn Vale. The closest flight path for the Alliance is the Rebel Camp in Stranglethorn Vale; the closest flight path for the Horde is Grom'gol Base Camp in Stranglethorn Vale.
There are two mounts in this instance: the Razzashi Raptor and the Zulian Tiger. The Raptor has a 0.9% drop rate and the Tiger has a 0.8% drop rate. I've only seen the Raptor drop once and I've never seen the TIger drop.