Except that people who exploit L1 just never reveal how they do it, good luck with that.

That's the beauty of the asymmetry against DRM, only a single decoded file (which will always happen) is enough for seeding to everybody.

This seems to be confirmed by the fact that most torrent sites have 4K copies of brand new streaming only content while no publicly known exploits exist.

Since you are running the exploit locally without affecting other peoples machines, I imagine it would be close to impossible to work out what exploit they are using.

Are those actual decrypted copies of the original stream, though? Or did they just re-record the output? For the latter you'd only need to break HDCP, right?

If the end user can't tell then it doesn't matter.

Well but there's likely to be at least a small quality difference, and a considerable a quality per file size difference, because the video would need to be re-encoded.

Yeah. They're WEB-DLs, not WebRips.

Not really, since that would entail breaking playback on current devices/firmwares.

They can only try again next time (for 8K?).

Broken TZ does not mean the algorithms are broken, only that exploits exist to bypass TZ. Fixing the exploits doesn't break anything about the algorithms for decode / decrypt.

I'm not sure what in my comment you were disagreeing to. Fixing the exploits would entail requiring a software update/breaking unupdatable devices.

Yep. I remember when Blu-ray "required" Windows Vista because it had better DRM APIs then a few months later the studios gave in and allowed playback on XP... which was immediately cracked. Ultimately you have to meet customers where they are which is old devices.

Until current broken devices fall out of use. Eventually, all devices might be secure.