> because it’s the same process of intermediaries accumulating, inferring and sharing data to each other

Except that YouTube doesn't need any of that to recommend Minecraft videos to you. One mundane explanation that seems more likely is that it's the type of content that on average works best on people they don't yet have information on.

Reminds me a little of these "phones listen to everything we say, otherwise I wouldn't have been shown this ad" anecdotes that don't hold up against empiric evidence.