it was funny because it was BYU. Whipped out his cellphone and started recording it and passed it along to a friend or friends as a "hahaha, BYU isn't all squeaky clean in everything they do" moment. And then it got posted anonymously online from there.
That said. ASU security staff were absolutely useless at that game. No point in having a security staff at all when they're as dumb and useless as they were.