My favourite are the Eric Rosen "Marathon" chess videos eg https://www.youtube.com/watch?v=NiU2tBfTyFU&t=7866s&pp=ygUTZXJpYyByb3NlbiBtYXJhdGhvbg%3D%3D https://

My favourite are the Eric Rosen "Marathon" chess videos eg https://www.youtube.com/watch?v=NiU2tBfTyFU&t=7866s&pp=ygUTZXJpYyByb3NlbiBtYXJhdGhvbg%3D%3D https://www.youtube.com/watch?v=NiU2tBfTyFU&t=7866s&pp=ygUTZ... 11:30 of blitz chess. You see how tiredness affects him at various points yet he maintains an unbelievably chill disposition throughout.