The problem is when you first find a video that's interesting you don't necessarily find the playlist that it belongs to. (or worse, you find it in someone else's playlist which includes the video along with other seemingly random videos that the playlist creator was interested in)

This is not available to... well, almost anyone. Seriously try searching for it. Every permutation of your search terms will bring you back to one of three results that all heavily imply or say that it's available to a select handful of channels

It's not even subscriber gated or verified channel gated, it's someone at youtube for some reason flicked the switch on for this channel gated