makes logical sense. dunno if the 10th dimension can be considered a dimension if a "point" is dimensionless. the point would need to be joined with another point to form a dimension (as stated in the video). but since there are no other universes to draw a "line" with after the 9th dimension, i think the 9th dimension is the last.
the light with the single and double slit tests, i saw that in my chem lecture. not that crazy but i had herd about the theory before i saw the video ..