In all these real-live dramas...
It's hard to overlook the fact that the terrified guy in mortal danger, from the environment or some disaster, is being calmly filmed by somebody right next to him.
On "Deadliest Catch," the crab-fishing reality show, they devoted a special episode to this normally-unsung film team which had to deal with all the same dangers as the fishermen.
There are some exceptions: I've seen films where the guy is actually alone, and photographing or filming himself. At least one "lone sailor" record-seeker did this, but I don't remember exactly who any more.