YouTube 3/2 Aspect Ratio Toggler (No dependencies)

Bookmark Code.js

(() => {
	let existing = document.querySelector("#ar")
	if (existing) {
		existing.remove()
	} else {
		let styleNode = document.createElement("style")
		styleNode.id = "ar"
		styleNode.type = "text/css"
		styleNode.appendChild(document.createTextNode("video{transform:scaleX(calc((3/2) / (16/9)))}"))
		document.head.appendChild(styleNode)
	}
})()

Terser Config.js

{
	module: false,
	format: {
		wrap_iife: true,
		preamble: "javascript:"
	}
}