datahoarder

One thing to keep in mind: if someone gave you a 5.25" floppy disk with this type of data on it, even if the data was perfectly readable, would you have any way to do it? You'd need to hunt down someone whos into retro technology and hope you can figure out how to decode the information. The format itself became obsolete, so even if the data would theoretically be accessible, the means to access said data may not be.

Point is, what are the chances that CD drives will be around in hundreds of years outside of a museum or personal collection? They're already becoming more and more uncommon after only a couple decades. But there really isn't a great solution to this, especially when it comes to video, because you can't just print it out.

Side note, are you sure that CD Golds are more durable than M-Disk?

I believe you're approaching this from the wrong angle - this isn't a tech problem, this is a people problem.

save them for posterity so that it lasts for periods like 200 years and more. This allows great-grandchildren and great-great-grandchildren to have access.

Instead of trying to get media that can last 200+ years, just teach your kids and grandkids the importance of keeping your family legacy alive. This will be way more effective than any medium you can come up it. Storage technologies change but the data remains the same, the future generations should be able to gradually upgrade storage mediums as necessary so the information keeps existing.

Cave paintings aren’t video or audio. They’re pictures. You can print your photos or print grabs from your videos.

Stuff like https://www.mdisc.com/ exist which claims 1000+ years of lifespan.. Kinda difficult to assert whether it's true or not tho.

Just make sure the NSA gets their copy and you are golden. /s

The two extremes:

1. Keep it alive on ZFS with frequent scrubbing. Review best practice every couple of years in case it's time to migrate it to holograms or whatever,
2. Clay tablets.

Digital data is extremely short lived. Unless it's being maintained well and copied, it will decay regardless of storage medium fairly rapidly. And as you point out data interface techniques are themselves quite short lived. Storing data as something accessible without specialist technology, so plainly readable, instructions on how to build the reader and decode the data, etc.

Future technology may improve this by having historians interested in historical records wanting ways to recover it, at least.

https://github.com/cyphar/paperback

Micro-film

https://piql.com

Print the videos onto film. Modern film can last pretty well.

Afaik it's either LTO tapes or a RAIDZ array, I like ZFS on Linux for that matter. Check the TrueNAS Scale distro for example. There are different raid levels, I use raid5..