Suitcase nuke?
The EMP from a nuke would have likely made it un video-able from most of the close angles.
A little John Tactical Nuke was 1 to 10 Kilotons, so the explosive force was the range of a small, tactical nuke.
No double flash. Not even a blinding flash. So, not a nuke. Doesn’t take a nuke to make a mushroom cloud.
There would not have been a surviving digital recording of it.
heard from one source Dave at X22Report that the building was used to store bombs and missiles for terrorists. Sounds like a costco for bad guys. He said someone or entity caused them to explode before they were able to be dispersed to your local terrorists.