I have no idea if it was popular. There's no data on how many views or shares his Snap story got, so it's hard to say.
There's no way to tell whether Jason Mamoa's Snap story about the Pittsburgh Steelers game was popular. We don't know if it went viral or got a lot of engagement. It could have been really interesting and attracted a large audience, or it might have been something more personal that only a few people saw.