Lately I’ve been working on something something similar to “dot crawl” observed in NTSC signals.
I remember that effect, but I always used PAL systems, so this is a bit a mystery to me.
BTW, it manifests as color fringes going relatively fast down the screen on zones where color suddently changes in chrominance along the x axis:
But the effect is better observed in motion, so you may want to look to Presets-4.1/tv-pal-my-old.slangp preset or manually activate it via:
Another improvement among shitty signals things is the RF noise, which gained another parameter, Snow noise:
…I don’t know if it is the correct term, but what it does is producing a more rarefied, more sparkling noise.
The old one has been renamed to “uniform noise”, instead.
Again, the effect is really not visible with a screenshot.