It remains common practice for nature "documentaries" to create fake narratives in editing. Pay attention to cuts, camera angles and changes in background scenery and you'll notice quite a lot of it. If they're showing two animals in some sort of confrontation but only ever show one of the animals at a time, you can be sure it's fake. If they're showing something that has several camera angles it's probably fake, particularly if some of the camera angles are very close or in a position that should make the cameraman visible in the other angles.
That popular video of a lizard running through a gauntlet of snakes is very fake. They probably spliced together many days of footage using captured lizards and snakes.
That popular video of a lizard running through a gauntlet of snakes is very fake. They probably spliced together many days of footage using captured lizards and snakes.