The problem with 'The Secret' etc. is that it often encourages pseudoscience and New Age horsepuckey. I prefer Ken Wilbur's "we CO-create our reality". Yes, positive thinking does improve your life, this is no secret -- Jesus preached it two thousand years ago (or so the Romans wrote) and the self-help industry has thrived on teaching these secrets, usually for really big bucks coupled with mild hypnotherapy techniques so that people will take all their courses (research LGATs on the net).
Here's something to chew on: if everyone had a million dollars, a million dollars wouldn't be worth squat. What good is a secret that puts you on the top when everyone's got it and the "top" is a level playing ground? -- if everyone could just get this knowledge (one of the goals of LGAT-type seminars and the positive-thinking market as a whole, both in altruistic intention and as a form of survival-propagation) and make the world a "wealthier" place, well why then everyone sure as heck wouldn't want to wash the dishes for rich people at restaurants, pump gasoline or fix sewage pipes. They'd be "following their dream," and working on a highway crew or ringing customers at the local circle-K sure isn't the dreams of most. In other words, if everyone had this "secret" and it really worked the effortless way it is trumpted to, the conflicting co-creations of "reality" everyone is supposedly constantly putting out would sure make a mess of our society in no time whatsoever.
IMO, it can be very dangerous when people use this "secret" to justify their personal conceptions of the world, especially when those conceptions are based out of ignorance. I haven't actually seen this video, though I've studied the source material for years and years. It does work, to a degree, though the emphasis on material acquisition is overhyped and dangerous (given how rapidly we are destroying the earth through the American obsession with BIG BIG LOOK AT ME) -- this material-focus in the positive-thinking genre essentially panders to the fact that the majority of people are programmed to a consumerist paradigm resulting from the 10,000 - 20,000 commercials an average child watches during the formulative years of 7-12.
As I said, I haven't seen the movie though I know what it is about. From the reviews it sounds about on-par with What the Bleep Do We know, a false, manipulative and shoddy product of "experts" including a woman who has bilked thousands of dollars out of gullible people pretending she channels a person from Atlantis.
Those who tend to make the most money from self-help are those who preach & package it.