You need more context on the private server discussions that have been ongoing over the past few years.
1. There are always variables that will affect a definite yes. I also need to point out that that video is at least a year old, possibly more.
2. The first part of the answer relates to SQ42, that is pretty clear.
3. Whichever stats you like, I would say. i.e., you can edit the ships/weapons/item stats like you would when modding any game.
4. Scope as relates to the private servers has always been about the scope of the universe itself, not whether the PU is in the scope. Private servers will not have all 100-odd star systems or the full AI and economy simulation, because your home server PC simply cannot run the full scope of the PU which they are going to host in the cloud.
Here is a bit of context for you (emphasis added):
https://relay.sc/transcript/10-chairman-episode-67
Priscilla asks: What is the scope for offline play outside of SQ42? Will I be able to visit planetside areas such as Arc Corp where I am the only one not an NPC, or go into the larger universe offline where it’s just me and an NPC world?
So currently we don’t have any plans for an offline version of star citizen mainly because we have so many parts that revolve around a huge simulated universe. So the only way we make this universe feel alive is because we have a detailed simulation running 20 million AI on a server that communicates with game servers and our solar system servers and that’s not practical on a single player mode.
So you know since squadron 42 is your single player game and then star citizen is multiplayer, either it’s sort of Massively multiplayer online using our whole infrastructure, which scales and can handle you know lots of players millions of players or there is the private server option which we’re going to do which will be after the squadron 42 and the massively online stuff is all up and running. But the private one will be more akin to the way freelancer works where you can run your own server. you definitely wont be able to have millions of people on it and probably wouldn’t be 1000’s. but it would be more sort of like freelancer with 100 or so it would be server stood up that you and your friends or whatever could match into and go around and the universe would be more static than it would be in the sort of vastly massively multiplayer simulated one because we got a lot more servers and computing power in the cloud and were sort of doing things that of kind of similar to what people have been talking about what the cloud can do for you, where you can put a lot more of the simulation up in the cloud and make the world richer so you know that unfortunately makes the single player game in a sort of Freelancer way style, privateer style, much harder to achieve.
I mean we probably could do a dumbed down more simpler version of the universe and it would look great and have lots of cool stuff it just wouldn’t be quite as dynamic but that’s not currently on the plans you don’t know whether or not maybe we’ll do that in the future, but currently that’s not on the development plans
If you can tell me which episode of 10ftC the video snip is from, I'll find the transcript for you.