There's a content block, which means that at least one performance in each has music for which ISU hasn't cleared the copyright. The performances that are
not the causes of the block are still available - individually - on the ISU channel at
https://www.youtube.com/@SkatingISU/featured
My usual advice (here and elsewhere) is to download anything you want to rewatch/keep as quickly as possible, especially these days. Of course, youtube are making it increasingly
hard to download

for their own reasons, so rock and hard place, we have them...