Gamblers don't believe that they can ever create a mess of themselves in gambling until it happens, when they come across someone who is an addict they believe it can never happen to them instead of them learning from the mistake of others they choose to be a special breed.
Videos about gambling addiction will only work on people who don't want to be caught in the same mess as those that are addicted to gambling, it's all about choices, some will be wise and some will be stupid kind.
Such videos won't save those who are already addicted to gambling and it won't stop some gamblers who are ready to lose their ways because of gambling anyways.