Twitch Plays Pokémon (partially found footage of Let's Play channel; 2014)
Twitch Plays Pokémon is an ongoing "social experiment" that is run by an anonymous Australian programmer on Twitch.tv. The stream has spawned a cult-like following since its beginning on February 12th, 2014 with the highest viewership count being 120,000 at once and reaching a total of over 30 million.
Despite its popularity, the first day and a half of the stream were not recorded by anyone. The recording of the stream did not start until Day 1, 11 Hours into the game, leaving the capture of important early characters lost. Since Twitch had deleted most archived streams, it's very unlikely that footage (aside from the 3 videos below) from this period will ever be found.
It's currently unknown what exactly happened before the first screenshot of Day 1. 5 Screenshots of Day 1 after 9 hours have leaked from 4Chan. 3 videos from the lost 35 hours have been found on YouTube.