The US believes they can get Vietnam to flip in a color revolution, they understand that's not an option for the DPRK, just like with Cuba. Even then, you can find plenty of slop online about how the government of Vietnam is secretly evil and so communist and so you should hate them. As for the development of the DPRK, you can't just destroy a country's infrastructure, genocide about 20% of their population and then sanction the hell out of them for decades and expect them to be doing awesome just because their government is socialist. Even then, it's not hell. But I agree you should honor testimonies, especially when the person speaking has no financial or legal incentive to lie one way or the other, so surely you'll want to watch this.