I am not sure if I can believe this story.

Let's wait and see what comes next.

I do not think the U.S. will allow SK to have nuclear capability. 
U.S. likes SK is dependent upon U.S. nuclear defense system.

If SK has her own nuclear weapons and rockets, the U.S. can not 

control SK as much as she likes to control.  
 

It is true that some U.S. politicians want to allow SK to have nukes,

but it is not in U.S. national interest.

I have not seen similar news from any other news organisation.

This may be a fake?

This is a huge problem in every nation on earth in the social 

media-dominated world. You tubers desire more subscribers 

and do not hesitate spread fake news to drum up more visitors 

to their sites. For it, it has to be sensational breaking news.

Any You tubers claim has to be backed up by mainstream news 

media. I think it is impossible for Youtubers to have more resources 

than mainstream news media.