Idea to shrink some code / less repetition.

// works for exact matches['postplay-still-container', 'WatchNext-still-container', 'countdown', 'adSkipButton', 'skipElement'].forEach(className => {var elements = document.getElementsByClassName(className);if (elements.length !== 0) {elements[0].click();waitCount = 5;return;}});

or if logging is important:

var logEnabled = true;function log(thing) {logEnabled === true && console.log(thing);}const exactTargets = [['postplay-still-container', 'Found autoplay.'],['WatchNext-still-container', 'Found autoplay.'],['countdown', 'Found Amazon video next.'],['adSkipButton', 'Found Amazon skip ad.'],['skipElement', 'Found Amazon skip intro.'],]exactTargets.forEach(target => {var className = target[0];var msg = target[1];var elements = document.getElementsByClassName(className);if (elements.length !== 0) {log(msg);elements[0].click();waitCount = 5;return;}});

`waitCount` should be `count`

@wOxxOm please delete this discussion. Thank you
I opened an updated and clean discussion at https://greasyfork.org/en/scripts/30029-netflix-marathon/discussions/86665