Consciousness creates materiality...

I'm not sure what Heeeeey's stance is here, but it's actually difficult to demonstrate that matter exists. You could take a radical Berkeleian stance and say that perception exists but there is nothing extra that is perceived - when you are examining a brain, there's no actual brain that exists outside of the minds of those examining. This would make what we think of as matter a projection of consciousness rather than a substance per se. This stance is so counter-intuitive that there's no real reason to endorse it other than to be a bit contrary or because it adds credence to one of your faith-based pre-conceptions about the world (for instance it combines very well with some variants of Hinduism), but it's very hard to refute.

Then there's also more dualistic stances that say that consciousness can exist without matter. Again this is hard to refute - how can we test whether there is non-material consciousness when science relies on investigating matter? Less extreme dualists are those that say matter is needed for consciousness, but is not by itself sufficient for consciousness - that one can envision an outwardly functional human that has no subjective experience and posit that there is something non-material that must cause that subjective experience. These stances are more compatible with Christianity.

Of course, why Heeeeey seems so certain about the topic is beyond me. Certainly materialism can explain the mind as well as these alternative theories can whilst being less counter-intuitive than Berkeley's subjective idealism and simpler than dualism.