I was already conscious of this. You might want to not watch this video if you choose to remain a more passive music listener, because after this you'll probably at least smirk quietly in recognition any time you hear a song like this.
The chord progression in question is I-V-vi-IV, that is, Do-Mi-So to So-Ti-Re to La-Do-Mi to Fa-La-Do and back again. The upper case Roman numerals indicate a major chord, the lower case a minor chord.
I've had a sort of sub-genre of songs like this in my head for a long time. Yes, sometimes I'm listening to a song and I think, "Oh, this is one of those one-five-six-four songs." Almost as popular is a very similar progression, I-vi-IV-V.
Anyway, this video is a great demonstration of what seems to be an extremely popular, if not the most popular chord progression in pop music.