Reduce a clip to two tones. Every pixel above the threshold turns white and every pixel below turns black, which turns footage into stark silhouettes and graphic shapes.
Threshold and softness
Move Threshold until the subject separates from the background. Softness widens the transition into a short gray ramp, which smooths edges and reduces the crawl of pixels that sit near the cut. For a dotted, dithered black and white instead, use the thermal printer video effect.