Agent 会自动调用 mco 命令，通过它指挥其他 Agent 并行执行任务。不需要去背 MCO 的参数，Agent 读一下 mco -h 自己就知道怎么用了。
h->next = free_list[classno];
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u = urljoin(BASE, href)
I was confident in that approach because you would not call multiple .play()s on the same page to lead a reverse engineer astray. Why? Because mobile devices typically speaking will pause every other player except one. If fermaw were to do that, it’d ruin the experience for mobile users even if desktop users would probably be fine. It also makes casting a bitch and a half. Even if you did manage to pepper them around, it would be fairly easily to listen in on all of them and then programmatically pick out the one with actually consistent data being piped out.