>>83591262It depends on how you want to count it due to youtube forced cutoff at 12 hours.
If you're strict about being one stream(no restarts) it would be the first terraria stream at 11 hours 58 minutes and 4 seconds.
If you allow for restarts I think it would be one of the Momotaro Dentetsu endurance streams just before new years (29th dec), that one is at a little under 16 hours when combined. The other stream of the same game that lasted between the 26th and 27th would also be a contender, above 16 hours, but she had a break of about 10-20 min before the new frame where as the break on the 29th was under 5 minutes.
And of course there is always her 24 hour streams, but those had breaks in it so it should probably be disqualified.