I meant apart from the problem of sharing a 20TB original scan, even making a '720P' version would take a lot of time and effort. It is incredibly slow working with, and recompressing 4K data and you need at least 30TB of HDDs in your computer just to be able to have the original scan in there, and enough working space to convert it to a lower res version. Or you have to do it in chunks. Either way it is a lot of work.

Doable, but a lot of work. Even just making those low res versions of the Super8 files took days.