I host a tournament on Halo that gets uploaded to YouTube, and the tournament goes in and out of games quite frequently, so the easiest way for me to record everything is to bookmark the theater mode clip so I can record it from different angles. Recently theater mode hasn’t been playing videos back at normal speed, which is a crucial part of my videos. Everything in theater mode is slowed down and I really hope this gets fixed.
I don’t know what to tell you but it’s probably going to be fixed or is already fixed or it’s a problem on your side.