It seems that every VBR update requires to download the whole VBR software of over 4GB ?
Then it is an ISO, but what I usually do is mount the ISO then copy out to like c:\VBR_12.227 (example of the version) then run the update from the folder.
But is there also a smoother update process as I have to update the Veeam Enterprise Manager, then the VBR server itself and then probably need to like rescan the vCenter, edit WAN accelerator, edit Veeam Virtual Labs, edit storage repositories, edit the unstructured data file shares etc then it would start to update the individual items when I click finish.