I've looked around quite a bit but haven't been able to find much of anything in the way of documentation for this feature.
How does it work?
Does it load random videos by specific artists?
Similar type songs, like Pandora?
Does it only use content from specific users/channels?
Does it load a certain number of videos?
What happens when it gets to the end of the list, if there is an end?
Is the list (relatively) infinite?
Is there any documentation about it?