Currently, Opencast shows a quite technical version information on both the admin UI and the login screen:
Opencast (v.4.0.0 - build: e7c5f47)
While it is handy for developers to have the exact version (build number) placed that prominently, this seems somewhat over-technical for non-devops Adopters.
The idea is to display the Version as:
... which seems more appropriate for normal users, but add the build number (date of build would be cool, btw) as mouse-over so that devops still can directly get the build number from the UI (vs. using a REST call) but normal users are not being presented information that has no relevance for them.