The best way is to apply your own strategies while the videos offer some ideas for beginners experienced people usually go their own way. Videos don't always work on the same basis, so new gamblers lose out and lose everything suitable for any strategy and all games of chance before depositing money you have to analyze the sites thoroughly and check whether they are reliable or not. Gamblers will not be fooled by this analyzing yourself will reduce mistakes and you will be able to learn something new and make it more experienced in the future.
The only thing you need to know when you are up to playing games of chance, which are purely luck based, like slots, for instance, is that no strategy can guarantee your not loosing all your money, and that no luck can help you is the gambling site you are playing on is a scam. Well, that's two things, actually, but that's all you need to know. The videos OP is talking about will become harmless to you if you know those two things.