Collecting some data to illustrate some more advanced coffee roasting concepts and I just did an 8 minute roast to an end temperature of 502F (about 40F hotter than my darkest production roast). 22.4% mass loss, gourmet scale 20.5. I don't recommend replicating that at home (if you want it that dark, it's probably better to spend more time and get there at a lower temperature).
According to YouTube Studio my videos typically get a weird gigantic spike in watch time after they've been up for about half a year. The one that's become the most watched coffee roasting video that actually provides good information on that site didn't get much for views in its first year. Now I just tell people to watch my stuff on https://video.typica.us/ but nobody does.
Author of Typica software for coffee roasters.