You cannot underestimate the power of any information in any form. I have heard people say that just one video on YouTube changed their lives. How effective a video will be determined by the content and the viewer's needs. If the right information a gambler needs is in the video it could be transformational. All content creators want to make money, but some are focused on giving out quality content that can be beneficial to viewers.
Ten therapy sessions won't change a compulsive gambler, not to talk of a single video. Changing problem gamblers doesn't happen that way, a lot of work goes into fixing the player's brain or emotions. Do you know that atimes conversations get countervailing for the player, such that they'll get aggressive on their therapist. Hence, it's not a day's job, or something a simple video made by a person who is not a therapist could impact on.
It's hard for me to imagine how addiction can be put in a positive light, but I think I can point out something from a recent interview with addicted gamblers. One gambler told me that he had lost everything and was in huge debt, he didn't know what to do with his life, but then a friend called him and cheered him up and said that everything would be fine. For some reason, this addicted gambler realized at that moment that life is wonderful and began to work on himself, earn money and work like never before, he began to love life even more. I don't know what happened in his brain, but sometimes bad situations can ultimately lead to something positive.