I get not wanting to watch a 4 hour video because there are a lot of youtube videos of that length with subjects that I couldn't care less about. Like I don't particularly care to watch a 9 hour retrospective on a video game.

This video is a very in-depth look at a niche subject and it doesn't waste any of its 4 hour length. I thought it was very interesting, and I'll probably take a look at some of her other videos now.