That's not correct. The live stream was only about 20 minutes long ?- so you can't watch a live stream for 73 minute when its actually not that long.
The 73min I believe is other live streams for active users. Not the finale itself.
I suspect about 20k watched the live stream which means there are about 40-50k daily active users. Not bad hey I wonder what the weekly or even MAU are - juicy as when you apply 5m users or 1om user to that ratio and spending about 23 minutes everytime )