You might have already had a look at this, but just in case you haven't, I managed to find time to watch this brilliant mini-documentary released by the +GoPro
This guy is amazing, he has a wonderful relationship with both lions and hyenas. Incredible. <3 Using the cameras to get the most amazing footage and really eye-opening voiceover to accompany.
It's worth checking out... as is more of the GoPro channel's videos for really interesting perspectives on some things that you might never get to experience.