I think youtube is on your side, as it's heavily biased toward random one offs video watching.

I'm always baffled by the suggestions when watching videos from some common series. There would be mostly accurate suggestions, and consistently two or three videos completely unrelated taken from my viewing history. For instance there would be 'Howto repair your dishwasher' in the middle of all the videos of a math channel.

I tend to massively subscribe to channels and watch in batches, so I have (and want to have) a very good idea of what's coming next in my queue.