就是不想看 VAST.

c4story.user.js

// ==UserScript==
// @name         研伝說動漫看看
// @namespace    https://knowlet.me
// @version      0.1
// @description  try to take over the world!
// @author       knowlet
// @match        https://www.c4story.com/*
// @run-at       document-end
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    // Your code here...
    const f = document.querySelector('iframe')
    const videioid = f.src.match(/videoid=(\w+)/)[1]

    f.outerHTML = `<video controls style="width: 100%;">
<source src="https://media-server2.c4story.com/${videioid}.mp4" type="video/mp4" />
</video>`
})();