This is the story of the glory and struggle of bringing a high quality YouTube experience to the mobile web. Once upon a time there was a web developer who wanted to play videos on the web. So he filmed a cat and wrote a Flash and a HTML5 player. He spent many hours making it work on his favorite desktop browsers and even the one his grandfather still used. People could watch his cat video, he smiled, and the world was good. Then one day someone put a browser in a phone and soon there were many phones with many different browsers. This new set of environments were even harder to develop for and had a slew of new terrifying bugs. The web developer was miserable knowing people couldn’t watch his cat video. With much time and effort he figured out many of the secrets needed to combat the evils of the different mobile platforms. Once again people could watch his cat video, he smiled, and the world was good. The end.