Actually it is called YouTube Name Mashup.
Enter a first and last name and it selects random YouTube videos.
It requires Chrome or Safari. (Seriously, even Mozilla dies.)
The association part?
Do this at a party, with or without topic mappers.
Divide into two teams. Each team has a turn at suggesting a first and last name for submission.
Teams have until the videos stop to write down a relationship (association to you topic map readers) with the roles in the relationship, between any subject in one video with any subject in the other video.
The best relationship is determined by applause from those attending the party.
Five rounds maximum.
Remember, the point of this exercise is to have fun and practice some imaginative thinking.