So this has bugged me or a long time and I wanted to see if there was some reason I'm missing. According to YouTube's docs all you have to do to enable NVR is click a checkbox in the livestream UI [0]. This would allow people to rewind/pause/timeshift the event. I hate that if you have a meeting or other obligation your only options are "pick up where they are live" or "wait till the event is finished then watch it from the start" (or often for me, both, watch from live then go back and see what I missed).
1-2 years ago the Washington Post had a copy/feed of an Apple Event with NVR enabled and it was wonderful. I assume they made a mistake or weren't supposed to be reproducing the feed because it only happened the one time that I noticed.
For the last few events I've taken to running this command right after the feed starts (modified for today's event):
ffmpeg -i $(youtube-dl -f best -g "https://www.youtube.com/watch?v=q5D55G7Ejs8") -c copy apple-6-6-2022.ts
I'd also be interested to know if anyone has any insight into why Apple doesn't allow this. The whole event is on YouTube after the feed ends, it makes no sense to me while they don't allow people to rewind/pause the livestream.
[0] https://support.google.com/youtube/answer/9296823?hl=en