I should also note that nothing in the video talked about any 5th dimension. Perhaps you made that up.
As for string theory and 11 dimensions, of which 4 survive, the theory explains certain things we observe in the universe but not others, and is not universally accepted.
The point of mentioning string theory was the video started to talk about "hyperdimensions." Very new age. Dimensions beyond the ones we observe directly are hypothetical simply because we cannot observe them. You can mold extra dimensions into whatever you want. That happened (for better or worse, I don't know) with string theory. Equations were pumping out infinity which is obviously a wrong answer. Add another dimension and infinities go away. So if the equations tested at the margins start throwing out infinities maybe we'll get another dimension. (Is it the tenth that's supposed to be complete in Planck space?) Since it's all hypothetical why not?
You get these conundrums when you try to conflate Science and Theology.
