Nobody saw a gun in a video. Nobody even saw something that looked like a gun. A chip bag, at most, is going to produce a bulge. No reasonable human is going to look at a kid with a random bulge in their pocket and assume gun. Otherwise we might as well start sending our kids to school naked; this is the kind of paranoia that brought us the McMartin Preschool nonsense.
Please provide the quote from the article, or link that lets you know, so confidently, that it wasn't passed through human review.