Setting up a systemd service to loop videos using VLC on a Raspberry Pi - linux

Question

I have a Raspberry Pi 4 that I'm using inside a display case to play some mp4 videos on loop. While normally I might simply open VLC using the desktop GUI, load them, hit play and maximize to fullscreen, I want this to be a bit more robust and capable of restarting itself. Also, I will note, for an undiagnosed reason, the above has resulted in video stoppage when I tried it.
What I've tried is to follow these instructions, but I would really appreciate some help to troubleshoot where I may be going wrong: https://gist.github.com/anthonyray/bb6fd7363cd99204330f17c54513f293
My videokiosk.service file looks like this:
[Unit]
Description=videokiosk
[Service]
User=kioskman
Environment="DISPLAY=:0"
ExecStart=/usr/bin/vlc -Rf pastels.mp4
WorkingDirectory=/home/sean/Videos
Restart=always
[Install]
WantedBy=multi-user.target
Its status after loading and trying to run it was:
● videokiosk.service - videokiosk
Loaded: loaded (/etc/systemd/system/videokiosk.service; enabled; vendor preset: enabled)
Active: failed (Result: start-limit-hit) since Fri 2022-07-22 10:47:52 EDT; 3min 56s ago
Process: 885 ExecStart=/usr/bin/vlc -Rf pastels.mp4 (code=exited, status=0/SUCCESS)
Main PID: 885 (code=exited, status=0/SUCCESS)
CPU: 430ms
Jul 22 10:47:52 raspberrypi systemd[1]: videokiosk.service: Scheduled restart job, restart counter is at 5.
Jul 22 10:47:52 raspberrypi systemd[1]: Stopped videokiosk.
Jul 22 10:47:52 raspberrypi systemd[1]: videokiosk.service: Start request repeated too quickly.
Jul 22 10:47:52 raspberrypi systemd[1]: videokiosk.service: Failed with result 'start-limit-hit'.
Jul 22 10:47:52 raspberrypi systemd[1]: Failed to start videokiosk.
The journal looks like this:
-- Journal begins at Mon 2022-04-04 08:44:56 EDT. --
Jul 22 10:47:52 raspberrypi vlc[885]: > Shutting down.
Jul 22 10:47:52 raspberrypi vlc[885]: [00486638] [cli] lua interface: Requested shutdown.
Jul 22 10:47:52 raspberrypi vlc[885]: [afc0d578] cache_read stream error: cannot pre fill buffer
Jul 22 10:47:52 raspberrypi vlc[885]: [afc0e188] mjpeg demux error: cannot peek
Jul 22 10:47:52 raspberrypi systemd[1]: videokiosk.service: Succeeded.
░░ Subject: Unit succeeded
░░ Defined-By: systemd
░░ Support: https://www.debian.org/support
░░
░░ The unit videokiosk.service has successfully entered the 'dead' state.
Jul 22 10:47:52 raspberrypi systemd[1]: videokiosk.service: Scheduled restart job, restart counter is at 5.
░░ Subject: Automatic restarting of a unit has been scheduled
░░ Defined-By: systemd
░░ Support: https://www.debian.org/support
░░
░░ Automatic restarting of the unit videokiosk.service has been scheduled, as the result for
░░ the configured Restart= setting for the unit.
Jul 22 10:47:52 raspberrypi systemd[1]: Stopped videokiosk.
░░ Subject: A stop job for unit videokiosk.service has finished
░░ Defined-By: systemd
░░ Support: https://www.debian.org/support
░░
░░ A stop job for unit videokiosk.service has finished.
░░
░░ The job identifier is 1446 and the job result is done.
Jul 22 10:47:52 raspberrypi systemd[1]: videokiosk.service: Start request repeated too quickly.
Jul 22 10:47:52 raspberrypi systemd[1]: videokiosk.service: Failed with result 'start-limit-hit'.
░░ Subject: Unit failed
░░ Defined-By: systemd
░░ Support: https://www.debian.org/support
░░
░░ The unit videokiosk.service has entered the 'failed' state with result 'start-limit-hit'.
Jul 22 10:47:52 raspberrypi systemd[1]: Failed to start videokiosk.
░░ Subject: A start job for unit videokiosk.service has failed
░░ Defined-By: systemd
░░ Support: https://www.debian.org/support
░░
░░ A start job for unit videokiosk.service has finished with a failure.
░░
░░ The job identifier is 1446 and the job result is failed.
Thank you for your time and thoughts.

Answer 1

Here is what has worked: Changing the WantedBy field to graphical.target; granting permission to the directory holding the videos to the service user.
Thanks to #MarkSetchell for asking the right questions.