When Prairie is searching Homer's near-death experience on Youtube, the search result shows that the video has 26,945 views but when she plays it, the counter shows only 11,492 views.
When Steve is talking to Prairie on the phone during the locker room scene, there's a guy that gets out of one of the shower stalls twice; right after she tells him "it's a long shot".
The subtitles of the English translation from Russian are incorrect. The father is incorrectly quoted as calling his daughter "cabbage", when he actually calls her "kitten".
The method used to bypass a network password would not work.
When the OA is watching YouTube, a lady is talking about a Pershing College quarterback who got injured. The quarterback shown is Collin Klein for Kansas State University. The video is dated November 2nd, 2007; Collin Klein was not on the team in 2007, but he was from 2008-2012.