fdo#82994: added missing media extensions

(cherry-picked from commit f43d50d1e470dbfbadb4e90135069f0ca89d65c7)

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>
Reviewed-on: https://gerrit.libreoffice.org/11398
Tested-by: Thomas Arnhold <thomas@arnhold.org>
Reviewed-by: Thomas Arnhold <thomas@arnhold.org>