grungy, grainy video effect

I wanted to degrade a video to black and white and give it a grainy effect. Here's what I started with:


I then used the following settings to extract the color from the image:


The image then looked like this:


I then applied a histogram effect, tweaking the red/blue/green channels only allowing the higher frequencies:



To give the image a grainy look:


However, the grains looked too sharp, so I applied a blur using a pixel width of 8:


To this result:


Here's a test video (4.7MB):
test video

The next experiment will tweak the audio for additional weirdness.