Your win or loss depends on how fortunate you are in any game at any given time. You could lose today and ended up winning big tomorrow. In the game of Casino, you win some and lose some. Some win extremely big while others don't. I don't think any casino is out there intentionally scamming you. No. It is your chances that is playing out in real time. If you are lucky enough to hit the right number, you smile to the bank.
Though it's true that winning or losing in gambling depends on one's luck, and that a casino doesn't necessarily stop you from winning, but, casinos have a house edge which makes the house have more probability of winning over the gambler, and that's how the gambling business model works. So if someone questions that, I don't think they will be right.
About scams, I don't also believe that guy in the video that casinos actually make certain users lose based on analysis and statistics. Of course it's their marketing strategy to keep the big rollers engaged but it is only the house-edge that makes them lose in the long run.