Why, we asked ourselves, would these RelaxMusic people upload scores of allegedly ethnic or national background music videos to YouTube? If people play them as background audio, they will not be looking at — and clicking on — ads, so the uploaders will not make money. Is it a public service? Some kind alternative facts thing? We don’t know. On the other hand, you can enjoy two hours of uncredited, unnamed mariachi (and other Mexican) muzak right here.