Public bug reported:

My attempts to get it to work with gnome video (Totem) fail due to a
missing decoder:

When I start the video with `xdg-open some.mp4`, in a window over the
first frame of the video player I get a popup that says:

```
Unable to play the file
meta/x-gst-fourcc-mett decoder is required to play the file, but is not 
installed.

Cancel | Find in Ubuntu Software
```

When I click "Find in Ubuntu Software",  another window is opened with a 
spinning circle which runs indefinitely without finding anything. The process 
that is spawns is this:
```
/usr/bin/gstreamer-codec-install --interaction=hide-confirm-search 
--desktop-id=org.gnome.Totem.desktop --startup-notification-id=_TIME1227877508 
gstreamer|1.0|totem|meta/x-gst-fourcc-mett 
decoder|decoder-meta/x-gst-fourcc-mett
```
This process, by the way, does not get cleaned up when the parent windows are 
closed - manual cleanup is required.

It appears that gstreamer shouldn't even require installing codecs,
since gst-play-1.0 is fully capable of playing the mp4:

```
gst-play-1.0 some.mp4
```

Other details:
- all of the totem's `Recommends` and `Suggests` packages installed.
- ffplay can play this mp4
- vlc can play this mp4


```
$ lsb_release -rd 
No LSB modules are available.
Description:    Ubuntu 24.04 LTS
Release:        24.04
$ apt-cache policy totem
totem:
  Installed: 43.0-2ubuntu4
  Candidate: 43.0-2ubuntu4
  Version table:
 *** 43.0-2ubuntu4 500
        500 http://us.archive.ubuntu.com/ubuntu noble/main amd64 Packages
        100 /var/lib/dpkg/status

```

** Affects: snapd (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: totem (Ubuntu)
     Importance: Undecided
         Status: New

** Also affects: snapd (Ubuntu)
   Importance: Undecided
       Status: New

-- 
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https://bugs.launchpad.net/bugs/2070804

Title:
  Gnome videos (Totem) cannot play mp4, snap store installer broken

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