I figured out the youtube suggestion algorithm

[ritaxis]

The first video is the money one.  Somebody's driectly making money of its views: that's why it's "featured" and has nothing to do with anything. The second video is suggested based on something you watched recently. The third video is completely random. After that are the videos that have anything at all to do with the video you're watching.

But that doesn't explain the Sandy Denny-Rammstein connection, still.