YouTube is a decade old! To celebrate, the video-sharing website has revealed its most watched videos of all time: and the official top 4 reads like a wedding playlist (Psy, Justin Beiber, LMFAO and Katy Perry) with Charlie Bit My Finger coming in at number 5. But mainstream stuff aside, what about all those weird and wonderful videos on YT – you know, the ones you actually like to watch? We quizzed four of our in-house team (just call them YouTube specialists), about what they would nominate as their top YouTube videos of all time.