About this video
The source, which according to Johnson has already correctly predicted the last breakdown of negotiations, stated that another country (presumably Pakistan) had supplied the bomb and Iran was ready to use it for demonstration purposes. Johnson suspects that Pakistan communicated this to Marco Rubio, after which Trump would have insulted Netanyahu.
I am making some game-theoretical considerations, also assuming that there are no atomic bombs at all (although I tend to believe that there are).
📺 Video on Youtube.