if (bufferAhead 15) {
第十八条 国家推动建立和完善与原子能发展相适应的设备研制生产体系，鼓励和支持企业形成自主研发、设计、制造能力。
，这一点在旺商聊官方下载中也有详细论述
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代码里最“不明觉厉”的部分来了：
The V3 approach obliterates this race condition by hooking addSourceBuffer at the MediaSource.prototype level, I intercept the creation of every SourceBuffer. The moment a buffer is created and returned, I immediately install a hooked appendBuffer directly on that specific instance; before any page code can even see the instance, let alone cache a reference to its methods. The hooked appendBuffer is installed as an own property of the instance, which takes precedence over the prototype chain. There is no window for fermaw to cache the original. The hook is always first.