As a youngster, way back in 2010, I remember watching a YouTube video that fascinated me.

I was learning to play the keyboard at the time and came across an upload by MysteryGuitarMan that lets you play a song by clicking on piano keys displayed on the screen. My song of choice? “Mary had a little lamb,” a classic for beginners.

This interaction was possible due to YouTube annotations, a feature that opened up novel avenues for creativity and conversions on the platform. Although no longer available today, other tools have come to the fore.