[perching_aix]

I guess they were (unknowingly?) quoting Tom Scott, unless he himself was also doing the same: https://youtu.be/jPhJbKBuNnA?t=384

[extraduder_ire]

I think he was quoting some unknown person, since the made the same comparison shortly before on an episode of Safety Third.

[timonoko]

The most famous literary expression of this idea comes from F. Scott Fitzgerald in The Great Gatsby. While discussing the tedious nature of listening to others recount their dreams, there is a general literary consensus often attributed to him (and other authors like Mark Twain or Henry James) that:

"Nothing is more boring than other people’s dreams."

-- by Gemini