Stock market is about probability. Even a monkey throwing darts will get some of the bets right. So many methods will succeed including chart patterns. But some have higher probability than others. When you dissect the data and look under the hood, you will increase this probability several fold. In patterns you are studying only one parameter. That is the shape of prices. So probability is not bumped up much.
Example : Suppose you are Nifty 50 trader. You apply your pattern logic and come to a decision. But you also so see what the FIIs are doing because they have a significant influence on Nifty. So you study their data…and come up with this FII chart shown below…This is OCT 26 2018(last point) and you can see they are going long already(green line), after which Nifty shot up. Also see how they started shorting early at the top.
So what I want to say is … study of FII data and a confirmation from it will give you much higher confidence than just patterns alone. In other words the more confirmations you get from multiple sources that much safer you are or the probability of winning goes higher. Of course, you can also study FUT and OPT data and increase probability even higher. This does not mean that if you next study astrology the probability of winning will increase even more. Because this astro parameter is mostly of lower quality. It doesnt add much.
And the video quotes evidences. So I think it is believable. Yes EVIDENCE is the key word in all of this !