Board Thread:Support Requests - Getting Technical/@comment-45310000-20200418011510/@comment-9605025-20200418013227

Legacy wikis do not require that names for videos match their format. In fact, videos, no matter how they are uploaded, don't include the extension in the name. Perhaps this is for the reasons you mentioned.

That said, I think keeping the extensions on other types of files is important as it allows users to easily identify the format. For whatever reason, the format is not always available via metadata (or at least, isn't displayed on the file page). If I try to download File:SampleImage but have no idea what format it is, how do I use it? - Edit:

The way videos work on the legacy platform suggests to me that the way the work on UCP is bugged. So I am glad you submitted a ticket for that.