Nuke, or not?

Can some one say whether or not it is a tactical nuke detonating in the video?
It resembles nukes seen in other footage. They say it is in Yemen but how would one know?

Quote:

(From the youtube page) Published on May 31, 2015 A huge blast in Yemen has raised concerns over the use of a possible tactical nuclear warhead by Saudi forces and allies. The type and cause of the blast is unconfirmed. https://www.youtube.com/watch?v=OsS_TGFjAXA

via International Skeptics Forum http://ift.tt/1AMGZXd