Youtube userscript to block ads in videos

www.youtube.com.js

const observer = new MutationObserver(mutations => {
	for(const mutation of mutations) {
		for(const addedNode of mutation.addedNodes) {
			if(addedNode.tagName === "VIDEO") {
				const video = addedNode
				video.addEventListener("timeupdate", () => {
					const adSkipButton = document.querySelector(".ytp-ad-skip-button-slot button,.ytp-ad-overlay-close-button")
					if(adSkipButton) {
						adSkipButton.click()
					}
					if(document.querySelector(".ad-showing")) {
						video.currentTime = video.duration
					}
				})
			}
		}
	}
})

observer.observe(document.documentElement, { subtree: true, childList: true })