Well Im a liar. Checked just now and it changed since last time I was looking into this.
cache-control private, max-age=11722 (~3 hours)
date Thu, 18 Sep 2025 14:19:15 GMT
expires Thu, 18 Sep 2025 14:19:15 GMT
it once again lands in browser cache. I remember a moment when it returned no-cache.
We are back to situation where:
- google doesnt get any info if user with adblocker keeps rewinding in that ~3hour window
- player refetches if you pause for few hours and come back, or decide to rewind 3 hour video to watch again
- your SSD is hammered with gigabytes of useless browser cache writes - might be good idea for Extension overwriting those headers to no-store/max-age=0