When Emmet talks about changing your consciousness in this video, he is really referring to the action of raising your personal vibration up to match the vibration of the desire or outcome you’re seeking. Now you can do this, but usually only on a temporary basis, because sooner or later, you will fall back to the level of your dominant personal vibration. The only way we can “permanently” raise our vibration to a higher level, is to change our beliefs to more loving ones. Those new loving beliefs have to become your dominant ones, and so then your personality becomes more loving, and vibrationally higher as a result.
This same action applies to knowledge. This is why you will not receive, or understand knowledge you are not a match to, or have not earned by way of expanding your awareness.