Sure. Sure. They've been close or getting closer for 10 years now.
I'll believe it when it actually releases and not a moment sooner. Otherwise I would be the opposite of shocked if July 2025 rolls around and it's still not out but still "close". As I would be if December 2025 rolls around and "there are only a few more issues, very soon!" is the statement. It's become a joke at this point and likely will remain the butt of jokes and rightfully so for years, perhaps decades to come in the open source and graphics design communities.
I’d err on the larger side for a disk. Assuming 1000 hours at 60fps, 1080p, serviceable bitrates I’d get an 16-18TB disk to start.
As to watchable that depends on how good your eyes are and the exact content.
I really hope you plan on naming these files descriptively or having a document that has tags and lists info for videos for easy searching as future you may not want to sift through hundreds of hours to find something.