An "UPD" can signify several technical changes:
: In academic or clinical settings, files with these prefixes often denote specific case studies or supplementary material for publications, such as "Video 1: Removing the subretinal proliferation band". IPVR-133-A.mp4 UPD
Instead of keeping both files, rename the original as: IPVR-133-A_ORIG.mp4 Then save the update as: IPVR-133-A.mp4 (active version) Keep a changelog text file ( IPVR-133-A_UPD_log.txt ) noting the date and reason for the update. An "UPD" can signify several technical changes: :