Ok: PeerTube is interesting. But: in terms of replacement? No. non-viable.
The problem you have is multifold - and one of them is constant content availability, and total bandwidth. The value of Youtube is on demand streaming - you click a video, it plays, basically anywhere in the world. The other value is… copyright: Because of the way youtube is set up, you don’t have the same kind of copyright problems as you would without the back end negotiating and systems youtube as put in place. You can think copyright as it stands is oppresive and sucks -and I agree; but with the law the way it is - youtube is the best work around that is feasibly possible.
Mirroring all of youtube needs piles of terrabytes of new storage DAILY. and it’s in the hundreds of thousands as a low end estimate. You need the computational power to do the transcoding. You need the distribution of servers to load balance and avoid over saturating and d-dossing any given server cluster.
The reality is the Torrent protocol has been around forever - and there is a reason it never really took off, despite live watching while streaming was feasible: It has too many pitfalls.
And then, there is the content creator side: If you want to make money - youutube is kind of the place to put your content up with youtube premium sharing, ad revenue sharing and so on once you can monetize your channel. And while there are all kinds of BS in regards to what can and can’t be monetized - there really isn’t a replacement, not for the average person just getting started - and not if you are trying to build your following.
Lets, for a moment, presume Iran has Nuclear weapons - and uses them. Lets just remind that Israel is known to have at LEAST 90 nuclear warheads, and several of those missiles are likely prepped ready pointed at Iran.
To put it simply: That move DOES NOT end well. If anything, it ends strictly worse then simply accepting that Israel crippled Iran’s infrastructure. And any hope for normalization and opening trade up on the global market outside of China, Russia, and North Korea becomes basically zero until the regime is overthrown. Even worse - if Israel opts for nuclear strikes to follow up their conventional ones after being attacked with nuclear weapons,there is a good chance it’s not just several years of repair work, but decades of set back that could easily lead to mass scale discontentment and open revolt against the regime by several factions simultaneously.
The reality is: Israel is not a force capable of sustained occupation of an entity like Iran. But they are a force capable of a decapitating strike. And the entire reason is, Israel has VERY LIMITED force projection capabilities - and, because of a lack of land boarder with Iran, would need cooperation with other states that may not be thrilled with opening themselves up to direct conflict in the short to mid term. The only real reason Israel has room to do a strike is 1. It’s retaliatory, and 2. entities like Saudi Arabia are liable to be just fine with their regional rivals basically offing each other, as Saudi Arabia is in a MUCH better position to take advantage in the event of Iran’s regime collapsing.
Which brings us to: Just because you have nuclear weapons, does not mean you use them. The reality is, nuclear weapons are a weapon of last resort - unless you are France, and then it’s a nuclear warning shot… Because France is just different.