fdo#82994: added missing media extensions

Change-Id: Ibbce02b43192fd3afb4984f5f38251a518d7be06
Reviewed-on: https://gerrit.libreoffice.org/11172
Reviewed-by: Michael Meeks <michael.meeks@collabora.com>
Tested-by: Michael Meeks <michael.meeks@collabora.com>