From the graduation announcement press release:
>Membership and exclusive member content:>Until July 28th, 2025 at 11:59:59 PM (JST).A reminder that there is roughly 24 hours left before memberships to Mumei's channel are disabled for everyone. This is your absolute last chance to ensure you've archived anything membership related you want from the original source. Her members-only video playlist is linked below.
https://www.youtube.com/playlist?list=UUMO3n5uGu18FoCy23ggWWp8tAhttps://www.youtube.com/@NanashiMumei/membership 