I just read that when RJ Barrett announces on the 10th it will be on TSN’s SPORTSCENTRE which can only be seen in Canada but the article has a link explaining how to watch it in the U.S.
https://duke.247sports.com/Article/...uncing-College-Decision-Live-on-TSN-109841890
https://duke.247sports.com/Article/...uncing-College-Decision-Live-on-TSN-109841890