Or is it overrated?

It's certainly a masterpiece and undoubtedly innovative, but yeah, I'd still say it receives more attention than it deserves relative to other pieces.

Is there a video that explains how calling something overrated has become overrated?

It was basically Leonardo's portfolio piece, showing subtlety and mastery without overshadowing the epic visions of potential future clients.

When I went to the Louvre last year, I stopped by the room where the Mona Lisa is hanging. What were people doing? Were they agape in awe at this masterwork? Were they contemplating the brilliance with which this painting was constructed? Nope. They were taking selfies with the goddamn thing. I don't think I saw a single person actually look at the painting for more than 5 seconds. Push your way to the front of the crowd, turn your back on the very thing you went all the way to Paris to see, then take a picture of you . . . with a picture.

Well played, cunts.