> because the video and especially audio quality is so atrocious for many of them
Of the few ones you watched, which had atrocious audio quality? I've watched many of them, and the video has been fine for all the recordings, and the audio quality obviously depends on the speakers setup, not the processing/encoding/quality of the video. But of the ones I've seen, the audio has been perfectly fine to be able to understand what's being said.
CCC has been perfecting the art of "recording, streaming and storing conference talks" for many many years, so it would be weird if it suddenly took a dive in quality. Would like to see what videos you're talking about here.
Edit: I just quickly went through all the videos on the page from the submission, to check the video/audio quality. All of them have perfectly OK video/audio quality while 2 videos could have been better mixed/mastered (volume too low) but nothing raising the level of your speaker wouldn't be able to fix.