I didn't find much in that video that wasn't listed here. More details on parts of it but that seems to be about it. MCA wanted to have more companions tied to the main plot but they decided against it. He seems to still hold the opinion that Yes Man, Vulpes, Benny, and Ulysses would have been great companions in the game. Cass also had a lot more reactive lines and things to say in the game originally that didn't make it.
I really do wish we could see what New Vegas could have been but it would require a ton of work. Then whoever worked on it would have to go through what to include and what to keep out, things to change between the old design and the stuff that wasn't cut. I'd be down to somehow help that but it's probably too much of a pipedream and something that would likely have some fans disappointed with the decisions the modders made.