Great article! I've always wondered how youtube implemented it. Love the interactive canvases too. But maybe it's just me, the canvases look blurry?

Rendering bezier curves on the client side seems reasonable. Calculating ~400 points and rendering 100 curves would not impact performance, but I wonder if these little interactions would impact performance if added up.

About YouTube's comment about Gangnam Style, it wasn't a tweet. You can't find the original post because it was google+, which is dead. Google said it was a joke shortly afterwards: https://www.cnet.com/tech/services-and-software/gangnam-styl...