[Question] How files are distributed across the moving paintings?

[babaludadavay]

Sorry if there was the same topic, I didn't find it

The basic idea is that I want to make certain animations appear at certain places.
It looks like there are several "packs" of files spawning randomly: atl_portrait_16_a, atl_portrait_25_mixed_a, atl_portrait_25_mixed_b.

Maybe somebody tested this?
I created bk2 files with numbers and letters and was hoping to see some pattern ... but no luck so far. Also I bumped into reversed image once, just for the record

[babaludadavay]

Update

It also seems, that for the most of animations (if not all) there are static proxy images ... which means they have to match the names, and the plot of course

[babaludadavay]

Update

Thanks to developers
Shorter sequences instead of full 20 sec footages work just fine (used 2 sec video)