This is a rather fun take on the “Evolution of Song” done by a barbershop quartet.
Saddly, finding stuff of theirs that is not christmas-based is at the time of writing very difficult. They did bring out an album:
And saddly their You-Tube channel is not as interesting as I’d have liked.
Their facebook page is still relatively active :
That all said, however, the posted video is still fun, and they are obviously talented.