There we have it. 21TB. That’s awesome.

I think it’s more than just color space. Most video algorithms are using a huge amount of tricks to get file sizes down. Hence why we have hardware acceleration to decode in many cases. It’s fairly complicated to do, and still has to send a massive amount of data on actual output to appear to be of good quality.

(In basic terms) video encoding is using differences between frames, not only reusing color bit info, but everything else. Distances between pixels between frames, and so forth. The very early mpeg4 stuff was really interesting and they’ve improved a lot over the years. Even mpeg2 is doing more than most people realize. Neither is lossless. It always surprises me that people don’t grasp this. That OTA TV, for example, isn’t lossless. It’s just that it hasn’t been re-encoded by your provider. Same with Blu Ray, even at 4k. It’s still lossy, it’s just at the highest they can get for the length of content. Similar to a 320kbps mp3. They do, however, have room for awesome lossless audio on Blu Ray these days, which is very nice.

Thank you for pointing out what true lossless compression is about. I’ve dealt with it in the audio world more over the years but also understand video decently. As with rar, zip, flac audio is another easily understood example.