It is an ocho...as it is called in Argentine Tango terminology.
No it isn't - not if we're referring to the same movement. They have just finished something else, in which pivots clearly feature, but then they move into a pretty basic open reverse. I wouldn't share Waltz123's charitable assumption that the woman's unexpected forward step was intended, though. It just looks as though she hasn't got a clue what she's doing, and has not been led to complete her rotation and step back, as normal.
The clips were a bizarre collection of bits and pieces - some of them a sort of woeful pastiche Argentine Tango, and the rest, Ballroom Tango, but all with a standard of execution and characterisation that made me laugh out loud when I watched it.