No surprise about that. I imagine a large portion of us completely ignore posts directly to youtube with no context outside of the title. Personally, I also wouldn't have shared around a video consisting only of floating images and text with technoish music playing. Seems like that is the youtube channels niche, though.
Interestingly, the formula for the Fourier transformation is wrong in both of these posts. In the image, the integration is from infinity to infinity, and in the video the limits of integration are negative infinity to negative infinity.
Submitted here: https://news.ycombinator.com/item?id=7291571 - although no discussion.