Something went wrong embed on the 404 page does not work

[se-bastiaan]

Describe the bug

The something went terribly wrong video on the 404 page does not work.
In other words, something went terribly terribly terribly wrong.

How to reproduce

1. Go to https://thalia.nu/asdfasdf;lasjdflasjdf
2. See error

Expected behaviour

The video correctly loads

Screenshots

Additional context