You do realize that optical discs degrade over time, right? Usually, they last a long time, but many people have found that old CDs, for instance, weren't manufactured quite right and the metal layer corroded over time.
Writable optical discs are far, far worse, and are completely untrustworthy as a long-term archive solution.
So I don't think you really can avoid the need for constantly managing and migrating your backups.
Finally, "a set of shelves" with movies can take quite a lot of space if you have hundreds or thousands of movies. To me, it's easier with music: I don't listen to that much music, and I listen to a large portion of my library many, many times over. Movie-watching is quite different from this; I don't re-watch movies or TV shows very often, but it's nice to have them available for those times I want to, or when a friend wants to watch something. So it's quite possible to collect far more video than audio, at least in my personal experience.
Nah. I've got 25 year old copies of movies that play perfectly well on optical media. 300 titles take up significantly less space than a bookshelf, and in a pinch you can just stack them all neatly in a tote or similar for long term storage. Observed reality trumps hypothetical reality.
Writable optical discs are far, far worse, and are completely untrustworthy as a long-term archive solution.
So I don't think you really can avoid the need for constantly managing and migrating your backups.
Finally, "a set of shelves" with movies can take quite a lot of space if you have hundreds or thousands of movies. To me, it's easier with music: I don't listen to that much music, and I listen to a large portion of my library many, many times over. Movie-watching is quite different from this; I don't re-watch movies or TV shows very often, but it's nice to have them available for those times I want to, or when a friend wants to watch something. So it's quite possible to collect far more video than audio, at least in my personal experience.