Comment by cmsimike

I don't know if this will be helpful to you but an open source media player, Kodi, recently added support for Netflix in the latest version of the app (by implementing a DRM engine for people to use).

This requires the use of the widevine library which then downloads things behind the scenes upon use (I believe). https://forum.kodi.tv/showthread.php?tid=329767

I can't imagine Google gave the OK to Kodi to use widevine so maybe you can see what they did?