Totem is not associated with any mime types

In /usr/share/applications/totem.desktop no MimeType key is specified. I believe this causes several tools to not be able to open video files. For example, the following commands fail silently:

xdg-open asd.mkv
gio open asd.mvv

The following command does open the file, but outputs it's being deprecated in favor of 'gio open'.

gvfs-open

I think his is basically https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=842805, but for Ubuntu instead of Debian, and on a Totem version where it has already been fixed for Debian.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: totem 3.26.0-0ubuntu1
ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13
Uname: Linux 4.13.0-32-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Wed Jan 31 08:46:06 2018
InstallationDate: Installed on 2017-10-22 (100 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
SourcePackage: totem
UpgradeStatus: No upgrade log present (probably fresh install)