The Stroop Test in psychology is a test that shows different facets of an experience can each interfere with the processing of the other. I actually stated it slightly wrong in the video: I said that it was about reading a word like "red" when it was written in a color like blue or yellow. Actually it is about identifying the color of that word despite the fact that it reads "red." But anyhow, these are simply flip sides of a coin.
The point in either case is that the nondual view of thought is to recognize it as being like a piece of abstract art, like being color, like being like the play of light... not inherently meaningful. But the difficulty is that thought seems to REFER to things, seems to be telling a story. So the sensation quality of thought is hard to perceive, because the mind is directed to what the thought is talking about.
Surrender and inquiry are in a way about recognizing this sensation quality of thought... and that even the "referential meaning" of it -- what the thought is talking about -- is merely part of this sensation. This sensation is the expression of the Self.