Why would anybody make closed source, freely distributable blob in the first place? Making zero money from it, but assuming responsibility for support (both client and server side) AND legal responsibility when hacked? Plus doing business development, in order to gain acceptance at all?
I've done some work on this last year -- it's possible to integrate with the Widevine PPAPI component (DRM library) included in Google Chrome to support decoding Netflix videos in any type of app.
Have you heard of this thing called Flash? Or Adobe Acrobat? Silverlight? MS Edge? Uber (the app, and incidentally actually/metaphorically Unicorn)? Google Maps? Netflix for iOS?
Flash is not free. Flash Player is. Flash is actually for-money product.
Adobe Acrobat is also for-money product. You probably meant Adobe Reader, which is similarly positioned to Acrobat like Flash Player to Flash.
Silverlight was and Edge is a way for Microsoft to prove value of the Windows platform, and in case of Silverlight, also of Microsoft developer tools.
Isn't Uber, the app, a way to sell services? Doesn't Netflix for iOS sell Netflix subscriptions?
Isn't Google Maps, together with all Google apps, a way to keep people online, use Google Search... and provide Google audience for ads?
Neither of these would be true for a free DRM. Just like Flash player was financed by selling Flash, Reader by selling Acrobat, Silverlight by selling Visual Studio, Edge by selling Windows, Uber and Netflix by selling services, Google apps by selling ads - what would you be selling in order to provide freely embeddable DRM binary? And tangent question, how would you build your brand?
I'm afraid you are asking for unicorns there.