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So they serve two versions of every file, one for browsers using Widevine's scheme and another for everything else using their own scheme? And the benefit of Widevine is that it's a closed-source blob shipped with the browser itself (or not, as is the fundamental issue solved by the OP) rather than some obfuscated javascript, so you have zero access to it? At least until it ultimately writes PCM to the soundcard where you can then do what you want with it.



They could use CENC and just serve one version with two key management systems, but I think they do serve two versions in practice.

And yes, by and large. Widevine offers a bit more than just being closed source in terms of Google doing breach monitoring and fixing but yes.




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