It is common for normal children to focus on one or two things for a while, such as learning the jingle in a commercial or eating cereal in some kind of Mickey Mouse bowl. Generally speaking, these temporary fanaticism will eventually pass. Some normal children are naturally unenthusiastic and don't like to be hugged, but that doesn't mean they must be autistic.
According to this passage, advertising films may be the cause of autistic can be inferred.