"So, present a legitimate reason why it wasn't made available. Go ahead. I'll wait here."
The content providers don't know who you are.
They don't understand what your app does.
You're not on the whitelist.
Unknown apps like yours that challenge their limited view of DRM, and how they think content licenses should work... these are Scary Things to them.
Imagine yourself in that meeting between lawyers from Hollywood and (non technical) executives at Google. Now try explaining the difference between CAPTURE_VIDEO_OUTPUT and CAPTURE_SECURE_VIDEO_OUTPUT. How do you think that meeting's gonna go?