Partially I’m wondering the physical aspect of how they fit in these places or get close enough to dangerous situations to film them; and partially I’m wondering how they seem to be in the right place at the right time to catch things like a dead whale sinking down into the ocean?
What are the odds they’d be there to capture that and how much time do they spend waiting for these types of things?
It takes a lot of luck and patience. It can take years to capture one scene. In Blue Planet II, the film crew traveled to French Polynesia to film groupers spawning. That event happens for less than an hour every year. They completely missed the spawning the first year, despite all the planning and preparation they did. They had to leave and come back the next year to film it.
It takes hundreds, if not thousands, of hours of filming to successfully capture an event: “The team then clocked up several thousand hours diving with the grouper, including round the clock sessions the following year when they were due to spawn, to film the event.”