Regarding autoskip, I have an interesting experience with it in the past.

My friend asked me to write a userscript that simulates pressing the "Skip ad" button, so he won't stain his mouse with grease while eating.

Checking if there is a "Skip ad" button every quarter of a second and invoking its click() method eliminated the video ads completely. As it turns out, the button existed alongside the 5 second countdown, just wasn't visible.

I don't know if it still works the same way today, but it felt good to accidentally make an effective adblock with five lines of code.