I've know youtubers that did upload videos as a hobby, but couldn't even afford to keep them locally stored in their hard drives after a few years. Makes the videos less valuable? In no way.
I sincerely don't understand any of your points.
If you build a house of straw because you're not technically savvy to build it out of brick doesn't mean you get to complain that the wind blew it down even if it was a big bad wolf. If you don't do something right, it's nobody's fault but your own. It's often called growing pains. Backups are a lesson best learned before they are needed but regularly only thought about after data is lost.
Let's apply this reasoning to a few other examples. Let's say you live in the jungle, and build your house to jungle building codes. Then, a logging company comes in and dismantles your furniture to make particle board for IKEA products. One could argue that if you were more competent, you'd be able to form a well-armed militia, build land vehicles and air craft, and defend your jungle home against the invaders, who are not infinitely powerful and could be dissuaded by even a reasonably well-run guerilla uprising. One might also argue that that's crazy. ;)
To put it another way, if being a guerilla fighter is the only way to have furniture in the jungle, we wouldn't expect everyone to become guerilla fighters, we'd expect a few people to become guerillas while most people lost their furniture.
Here's another example. Let's say you're a US citizen concerned about civil asset forfeiture. If you were more competent, you would smuggle your wallet across the states where that happens inside of your hubcaps, or maybe in a drone, or perhaps in a shallow-water submarine. On the other hand, it's a bit might-makes-right to assert that only people who can assemble smuggling vehicles have property rights. Again, if that was the way to have property rights, we'd expect a few people to become smugglers and almost everyone else to lose property.
So finally coming back around to the YouTube thing, if we say that the way to have a platform is to build servers, organize communications networks, and arrange payments outside of the usual system, then we would expect a few people, almost all of them criminals, to do that, while most people simply would lose their platform.
If you don't rely upon youtube, you don't need to worry about youtube. If you choose to take advantage of the ease and convenience of utilizing their freely-available service, you have to deal with their rules. For most people, it's a small price to pay. For everyone else, there's stackoverflow.