Not sure of the specifics of implementation proposed but I imagine that the actual DRM decryption would have to happen somewhere in the guts of the kernel and t

Not sure of the specifics of implementation proposed but I imagine that the actual DRM decryption would have to happen somewhere in the guts of the kernel and the HTML part would mainly be metadata. DRM only implemented at browser level would be laughably bad as screen capture software would defeat it. Fundamentally though this isn't really any different from current Silverlight based DRM. Things like netflix don't work on Linux (without hacks) as it stands. Other non-drm video (which constitutes the overwhelming majority of web video) would continue to work as it does today. Besides even closed source DRM enforcement mechanisms can be defeated by someone with strong asm skills and enough time.