While many have already pointed out, most likely 4k60p without ProRes is enough to be future proof. You do not need the ProRes extra info for editing.
But there are some other respects regarding to the archiving that might be more concerning. Any flash storage like SSDs or flash drives might loose the stored information if not used frequently.
Cloud storage or private YouTube sounds like a good solution, but there is a risk that the current rules for storage that you agree to might change in the future and this means that you might lose some videos if the storage rule changes or there are new activity requirements.
By looking at the past few decades I can see that the best archive media (taking into account accessibility and availability in past 20 years) would be a physical optical disk such as a DVD/BlueRay. So I would also strongly recommend to also prepare some physical disks as backup. Now the next question is where to store them long term.
While many have already pointed out, most likely 4k60p without ProRes is enough to be future proof. You do not need the ProRes extra info for editing.
But there are some other respects regarding to the archiving that might be more concerning. Any flash storage like SSDs or flash drives might loose the stored information if not used frequently.
Cloud storage or private YouTube sounds like a good solution, but there is a risk that the current rules for storage that you agree to might change in the future and this means that you might lose some videos if the storage rule changes or there are new activity requirements.
By looking at the past few decades I can see that the best archive media (taking into account accessibility and availability in past 20 years) would be a physical optical disk such as a DVD/BlueRay. So I would also strongly recommend to also prepare some physical disks as backup. Now the next question is where to store them long term.