Opta Sports are one of the main providers of statistics to football clubs and TV channels broadcasting games. This video takes a look inside their office on match day focusing mainly on a QPR vs Norwich game from February 2nd of this year.
The setup seems surprising low tech with all player movements and touches logged manually by workers watching the games. We also see statistics being sent to commentators watching the games. They don't just produce those stats of the top of their heads, you know.
A pretty interesting watch for anyone fascinated by sports stats.
via Reddit