Yes, indeed, two videos, one is better quality than the other. They might give the impression the Taronga Gorillas are always fighting but of course they aren't and Kibabu is a very good group leader I know. However I did wonder if these fights arise partly because of the rather too small enclosure ( I believe also they are shut outside during the daytime) as lack of space can lead to extra tensions arising.
They really need an enclosure approaching the size of the Chimpanzee one but I can't see them getting it.