If you upload a 4K video to Vimeo, then the original 4K version is still made available to download, so maybe that's an easy option going forward. Anyways, thanks again. I've got an URSA PL mount in my hands for the next few days to play with!
Not only is it beautiful, but it's a sigh of relief for me because I was thinking of getting an EF mount URSA and I've got Rokinon lenses and was wondering how they would hold up. :-)