Social Econ Blog

Below is the video for U2's latest song "Window in the Skies." In it, some 100 clips of other artists playing drums, guitar, bass, or singing are spliced together in a way that makes it appear that they are playing the song. It is an impressive feat. I am curious if they developed some sort of algorithm that allowed them to find video clips that would roughly match the song -- particularly the words. Do you figure out a range of word/sound combinations that would be roughly similar to what's in the song and then search songs to find stuff similar, then search for video of these songs? That's my guess, but I couldn't find any articles or anything explaining the process.