Yes, there is a way. Bookmark the thread, leave it a week or so, and then read the thread normally because there won't be any new comments anymore. Certainly it's not the end of the world if you leave a thread to mature.
Yeah, race highlights are never 23 mins long so that was probably a screw up. And maybe a copyright takedown allows them to have all other such 23 min reuploaded videos automatically removed?
I didn't read the paper, but if they can measure its orbital eccentricity, they can see if it's gravitationally bound to that star. Like they did with ʻOumuamua.
Stardust cost 200 million and collected a few grams at most. Hayabusa cost 100 million and collected less than 1 gram. I think those two beat Osiris in price/weight.