And your curiously satisfying video of the day is... this one!
Remember how Daft Punk's disco-style 'Get Lucky' fitted perfectly over a 1970s video of people dancing?
Well, some bright spark has realised that Taylor Swift's 'Shake It Off' works similarly well when put to a video of people doing aerobics in 1989 - the year that's also the title of her new album (because it was the year that Swift was born).
Prepare to have sudden rush of nostalgia, '80s kids...