That would break more than it would fix. Video is hard (not all devices or browsers support the same codecs, bitrates, frame rates, etc), and YouTube has to use the User Agent to try to serve videos that the client can actually play. A random User Agent would mean that all those browsers that need a special video format wouldn&#x27;t get the type of video they need, which sounds like a crappy world to live in (compared to the crappy world we already live in with meaningful User Agents).