Simon has filmed this video without my help. This was completely upon his own initiative. He used OBS to record the tutorial, uploaded it to YouTube and added some end screen annotations, all by himself. He wrote:
In this video, I attempt to describe the idea of psudo-randomness, then code an example (but don’t run it because otherwise your CPU would explode).
Link to Numberphile video about Random Numbers: https://www.youtube.com/watch?v=SxP30euw3-0