Video the zillions of tiny eclipse images, as the eclipse proceeds, which are produced by the gaps in foliage.
Any set of bushes or trees in front of the sun will have the effect of presenting many, many tiny apertures, each of which will cast an image of the eclipse on the ground or another surface (e.g. a wall, depending on the angle).
It's pretty ...
The British Mountaineering Council has a website and YouTube channel called "BMC TV". There are numerous instruction videos, interviews and clips of competitions.
Here is a bit of a contrast to show you what comps looked like a few years back:
A big contrast to contemporary comps here:
As a follow-up not to be super nit-picky but you mention 'I'm trying to analyze rock climbing videos' yet you say you are looking for ...