A video viva is still just a viva in the same way that an ebook is still just a book. There are fundamentals that we would expect in both cases – a conversation in a viva, text in a book – but features that mark the experiences of a long distance viva or an ebook as being different in some way.
Video vivas require special equipment. There are extra rules and regulations. It really helps if the people involved have had practice with the software beforehand. The distance can cause a signal delay that is awkward at first.
And yet, for all the differences between a video viva and one on campus, it’s still just a viva. Complete within a few hours, very little extra prep, no big differences in what is being done. Rather than focus on what makes the experience unusual compared to previous expectations, it’s much better to invest time in preparing for it.