https://bugs.winehq.org/show_bug.cgi?id=47905
--- Comment #38 from m0rvj johnpgoodman@gmail.com --- I asked the devs for more details about how it works, answer: The video files are downloaded via HTTPS from a CDN. They're fed into MediaFoundation via a custom proxy. That is, our own custom implementation of https://docs.microsoft.com/en-us/windows/win32/api/mfobjects/nn-mfobjects-im... Everything is done through public MF COM APIs.