https://www.youtube.com/watch?v=5rYLk1jmTO4
Didn’t find any A-flat Polonaise, but here’s Tiffany Poon (official classical pianist of the Undead Thread) playing “Variations Brillantes.”
Back in September 1939, er, 2009 I posted this Polonaise each day until Warsaw finally surrendered. I read that it was broadcast daily from Radio Warsaw also.
https://www.youtube.com/watch?v=W1Qq3RA19G4
https://www.youtube.com/watch?v=j5ScGtmvSgY
Here are some others:
https://www.youtube.com/watch?v=iFvqvZOtCF0
https://www.youtube.com/watch?v=fW0Y3M4EJ4M
https://www.youtube.com/watch?v=8QT7ITv9Ecs
https://www.youtube.com/watch?v=iFvqvZOtCF0&list=RDiFvqvZOtCF0