Just seen this on Twitter*: https://twitter.com/Spiraloutpictu1/status/1158414535956541441?s=20
And this on Youtube: https://www.youtube.com/watch?v=p_iSjcw3fh8
I think these are the same film. They're both Scottish photographers/filmmakers so hopefully a fair bit of Scottish caving featured. No idea when it's out.

* Yes, Twitter.