autoplays videos on reddit
// ==UserScript==
// @name Autoplay Reddit
// @version 1.11
// @description autoplays videos on reddit
// @author abbott
// @match *://*.reddit.com/*
// @namespace https://greasyfork.org/en/scripts/22892-autoplay-reddit
// ==/UserScript==
var idx = -1; // video idx
var youtube = '.*(youtu.be\/|v\/|e\/|u\/\w+\/|embed\/|v=)([^#\&\?]*).*'; // youtube video id regex
var player;
// youtube api
var tag = document.createElement('script');
tag.src = "https://www.youtube.com/iframe_api";
var firstScriptTag = document.getElementsByTagName('script')[0];
firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);
tag.onload = setTimeout(playNext, 1000); // waits a little bit before starting the videos
function playNext() {
if (idx < -1) {
idx = -1;
}
idx++;
console.log(idx);
if (document.getElementsByClassName('expando-button collapsed video').length <= idx) { // loads next page when done
document.getElementsByClassName('next-button')[0].getElementsByTagName('a')[0].click();
}
if (document.getElementsByClassName('title may-blank outbound ')[idx].href.match(youtube) !== null) { //ignores non youtube links
var match = document.getElementsByClassName('title may-blank outbound ')[idx].href.match(youtube)[2]; // gets youtube video id
document.getElementsByClassName('expando-button collapsed video')[idx].click(); // display video
window.location.hash = document.getElementsByClassName('expando-button video expanded')[0].parentNode.parentNode.id; // move window to video location
document.getElementsByTagName('iframe')[2].src = 'https://www.youtube.com/embed/' + match + '?enablejsapi=1'; // replaces reddit media iframe
document.getElementsByTagName('iframe')[2].enablejsapi = "1";
player = new YT.Player(document.getElementsByTagName('iframe')[2].id, { // attach api to video, should start at index 2
events: {
'onReady': onPlayerReady, // autoplay
'onStateChange': onPlayerStateChange // on end play next video
}
});
} else {
playNext();
}
}
function onPlayerReady() {
player.playVideo(); // autoplay video
}
function onPlayerStateChange(event) {
if(event.data === 0) { // when the video ends
next();
}
}
function next() {
document.getElementsByClassName('expando-button video expanded')[0].click(); // close video
playNext();
}
document.onkeydown = function(e) { // skips current video if n is pressed
if (e.keyCode == 78) { // n
next();
} else if (e.keyCode == 66) { // b, previous
idx -= 2;
next();
} else if(e.keyCode == 82) { // r, replay current
idx--;
next();
}
};