Comment 2 for bug 751101

Chris, thanks for the quick and useful reply!

I've updated Totem's desktop file per your suggestion and it fixed the problem for me locally. Documenting the workaround for anyone who would stumble upon this issue:

- edit /usr/applications/totem.desktop (requires sudo) by adding "x-scheme-handler/mms" at the end of "MimeType" line
- run `sudo update-desktop-database` to update the MIME types cache