I have played 'hhh' by itself a few times for folks. It was one of most fun sections to put together and also the last one we did. After going through the whole film it was clear it needed its own section.
We have what's catalogued, and we have what's not catalogued. Ephemeral material is sorted by country, but as it's not catalogued online, it's much harder to search in. Not all of it is in the card system, either.