I'll continue the report on the 2021 event in a follow-up 'Live' post.
The Saint Louis Chess Club has videos for all three days, three rounds per day. Here's the video for the first three rounds.
2021 Champions Showdown | Chess 9LX: Day 1 (4:10:36) 'Streamed live on Sep 8, 2021'
The description informs,
The world’s top grandmasters battle from September 8-10 in a Fischer random chess round robin. It's Chess960: see what happens when bank-rank pieces are scrambled and opening theory is obliterated! Join GMs Alejandro Ramirez and Maurice Ashley for the move-by-move.
Here are the links for all three days, including the first dayembedded above. '2021 Champions Showdown, Chess 9LX, streamed live on':-
As for past events, the 9LX organizers used a non-standard numbering system to identify the start positions (SPs). See this page to convert to standard numbering: Chess960 Start Position Converter for Chessgames.com (m-w.com). Here are the nine SPs from the event (using standard numbering):-
Rd.1: SP105 QNRBBNKR
Rd.2: SP280 NBRKBNRQ
Rd.3: SP431 RNQNKRBB
Rd.4: SP268 NBRKNQBR
Rd.5: SP137 NRQBBNKR
Rd.6: SP819 BRKNQRNB
Rd.7: SP047 NNQRKRBB
Rd.8: SP209 BNQBRKNR
Rd.9: SP756 RBBKNNRQ
The PGN game scores were distributed with TWIC 1401. I've extracted them to m-w.com/c960/blog, hoping that some day I'll actually be able to play through them.