The TROS actors, JJ and John WIlliams talk about their characters / experiences of Episode IX (most videos are 2-5 minutes long):-
Ian McDiarmid on Playing Sheev Palpatine in The Rise of Skywalker - https://www.youtube.com/watch?v=Qxjnc1dh6aE
Domhnall Gleeson on Star Wars Episode 9 - https://www.youtube.com/watch?v=sSKv8azjZ4g
Billy Dee Williams on Lando Calrissian in The Rise of Skywalker - https://www.youtube.com/watch?v=-Wd56pK_vnU
Kelly Marie Tran on Rose Tico Role in Star Wars Episode 9 - https://www.youtube.com/watch?v=gHqb-05c75g
Keri Russell Discusses Zorii Bliss on Rise of Skywalker - https://www.youtube.com/watch?v=X7Irdo30-LI
Richard E Grant Talks Star Wars: The Rise of Skywalker - https://www.youtube.com/watch?v=Gwfq8sx8--o
Joonas Suotamo Talks Chewbacca on Rise of Skywalker - https://www.youtube.com/watch?v=gFNJMKjVJMQ
Adam Driver on Kylo Ren in Episode 9 - https://www.youtube.com/watch?v=gE92FSgUY9I
Naomi Ackie Discusses Playing Jannah in The Rise of Skywalker - https://www.youtube.com/watch?v=ZEKX5hjKO0M
Anthony Daniels Talks C-3PO’s Role in Rise of Skywalker - https://www.youtube.com/watch?v=99MsO55xzhE
JJ Abrams Interview on Star Wars Episode 9 Final - https://www.youtube.com/watch?v=WWSo_JqiL7Q
John Williams on Star Wars: The Rise of Skywalker Score - https://www.youtube.com/watch?v=0ZfdpggIX18
Daisy Ridley Discusses Rey in Rise of Skywalker - https://www.youtube.com/watch?v=ehiqdISV90Y
John Boyega on Finn’s Journey in Star Wars Episode 9 - https://www.youtube.com/watch?v=MsSHSZpyFGM
Mark Hamill Talks Luke Skywalker in Star Wars Episode 9 - https://www.youtube.com/watch?v=Zv4SN_f2DVc
Oscar Isaac on Playing Poe Dameron in The Rise of Skywalker - https://www.youtube.com/watch?v=2TX4IQSH9j4
‘B-Roll from the Set of Star Wars Episode 9: The Rise of Skywalker’ (contains spoilers) - https://www.youtube.com/watch?v=_Et5GVuprMI