Well, that's that movie, then.. nothing to do with perennial philosophy, from what I can see.

I'm not sure how it being from a movie discounts it as a theory of perennialism.

If it is, please provide some evidence of it.

I'll meet you on your terms. Let's look at Huxley.

According to his research and the works he chose to survey, what is it that one might conclude he sees as being "the single, metaphysical truth or origin from which all esoteric and exoteric knowledge and doctrine has grown?"

https://en.wikipedia.org/wiki/The_Perennial_Philosophy