Wildlife videos with Nikon D500 + Nikon 200-500/5.6

I really liked the video.  I never paid attention to the birds walking on water to lauch before!

I've been shooting some 200 fps videos on an OM-1 using a 150-400 lens and 1.4 plus 1.25x convertors.  I can slow this down to 15% speed in post on a 30 fps time line.  But it is 1080p.  The very slow motion is great for insects, less useful for slow moving big birds and mammals, where 60 fps may be more appropriate.

Some things to consider when going to faster than normal frame rates on even the newer cameras...

At max frame rate on my Olympus, the focus, exposure, and white balance are fixed when the recording is started, regardless on the mode selections on the camera.  (Manual focus still works.) This is because all the camera computer power is used just to handle the frame data.  The camera is pretty much in full manual mode.  As the frame rate setting is decreased, some of the automatic functions become available again, and it will be possible to go to 4k.  Usually, there are changes at 60 fps and at 120 fps.

The camera's processing capability may limit CAF and tracking accuracy at the higher frame rates, even if they are available.   This can be a surprise if one doesn't expect it.

My point being that working with a full manual camera for a while while the camera capabilities continue to be upgraded for the faster frame rates is still a worthwhile exercise, as it will be great preparation for whatever limitations may still exist in whatever you buy next.

Just be sure to check the CAF, CAF+Tr, auto exposure, crop factor, image stabilization, available codecs, color balance, 1080 vs 4k vs c4k, etc., versus frame rate and bit rate very carefully before plunking down a lot of cash on the new gear, and keep your left hand in good operating order, LOL.