When Felix Baumgartner jumped from the Red Bull Stratos space capsule on 14 October 2014 he broke a lot of records. He was the first person to break the sound barrier while in free fall (or without the use of an engine.) He broke the world record for the highest balloon flight and he broke the record for the highest jump.
But perhaps the most interesting fact for those in the TV streaming business was that he broke the record for the most live streams with more than 9.5 million people watching concurrently.