Add v1 version for reference

Author: ZimbiX

v1.js

@@ -0,0 +1,58 @@
+// ==UserScript==
+// @name         YouTube fast fullscreen toggle on X key
+// @namespace    http://tampermonkey.net/
+// @version      0.1
+// @description  try to take over the world!
+// @author       Brendan Weibrecht
+// @match        https://www.youtube.com/watch*
+// @grant        none
+// ==/UserScript==
+
+(function() {
+    'use strict';
+
+    const fluff = ['#secondary', '#info', '#meta', '#comments', '#masthead-container', '#speedyg']
+
+    const setFluffDisplay = (value) => {
+        fluff.forEach(sel => { document.querySelector(sel).style.display = value })
+    }
+
+    const hideFluff = () => setFluffDisplay('none')
+    const showFluff = () => setFluffDisplay('')
+
+    const isFluffShown = () => document.querySelector(fluff[0]).style.display != 'none'
+
+    const clickFullScreenButton = () => document.querySelector('.ytp-fullscreen-button').click()
+
+    const enterFullScreen = () => {
+        hideFluff()
+        clickFullScreenButton()
+        setTimeout(() => showFluff(), 40)
+    }
+
+    const exitFullScreen = () => {
+        hideFluff()
+        clickFullScreenButton()
+        setTimeout(() => showFluff(), 40)
+    }
+
+    const isFullScreen = () => document.querySelector('.html5-video-player.ytp-fullscreen')
+
+    const fastToggleFullScreen = () => {
+        isFullScreen() ? exitFullScreen() : enterFullScreen()
+    }
+
+    document.addEventListener("keydown", e => {
+        if (e.code == 'KeyX') {
+            fastToggleFullScreen()
+        } else if (e.code == 'KeyF') {
+            alert('Reminder: Press X instead for speed!')
+        }
+    })
+
+    /*document.addEventListener('wheel', e => {
+        if (e.deltaY > 0 && !isFluffShown()) {
+            showFluff()
+        }
+    })*/
+})();