Not There
A viva over video is still a viva. It’s alright that there are pauses caused by technology.
A viva over video is still a viva. Practise with the software you’ll use and think about the space you’ll be in.
A viva over video is still a viva. Expectations are different but that doesn’t make them bad.
A viva over video is still a viva. It doesn’t matter if you’re not there in the same room as your examiners.