Boy howdy, users sure would love to pivot to a peer distributed content system that randomly downloads chunks of a video file as they become available with speeds of anywhere between 2 bytes and 2 megabytes a second (which one you'll get depends on who you're getting the chunks from) with literally no guarantee of being able to even complete said download because the people they're downloading it from may not all have the entire file's worth of combined data across their respective computers, and they have to download the entire video before watching it to determine whether or not they even want to watch it in the first place. Also, there's no capacity for monetization without literally doing what Google is trying to do and injecting advertisements directly into the video, so there's no incentive for any content producers to use this system to distribute said content, meaning it would be a ghost town of a service from the start.