// ==UserScript==
// @name 南方医科大学爱课平台自动二倍速静音播放全部视频/Auto Aike 2x Speed Muted Video Player
// @namespace https://aike.smu.edu.cn/
// @version 1.2
// @description Automatically play videos at 2x speed and mute on Aike
// @author Lily Yu
// @match https://aike.smu.edu.cn/*
// @grant none
// @license MIT
// @downloadURL none
// ==/UserScript==

(function() {
  'use strict';

  // Define the elements to be manipulated
  var videos, nextPageButton;

  // Wait for the window to load completely
  window.onload = function() {

    // Find all the video elements on the page
    videos = document.querySelectorAll("video");

    // Find the next page button on the page
    nextPageButton = document.querySelector("#next-activity-link");

    // Loop through all the video elements
    for (var i = 0; i < videos.length; i++) {

      // Get the current video element
      var video = videos[i];

      // Play the video at 2x speed and mute
      video.playbackRate = 2;
      video.muted = true;
      video.play();

      // Add an event listener to the video element to detect when it ends
      video.addEventListener("ended", function() {

        // Click the next page button to load a new video
        nextPageButton.click();
      });
    }
  };
})();