I might be jumping to gun as ds only just submitted Cambridge application for a STEM subject, but he meets the criteria for an interview so assuming he is called, what does he expect in terms of online interview? Specifically the format/practicalities.
One of the colleges mentioned needing a white board or A3 paper and marker to show workings, which makes sense but he thought there were restrictions on where you can have an interview to avoid getting assistance. No chance of me being able to help if it was at home!
I can't find anything online that gives guidance and his school is pretty inexperienced with Oxbridge applications.
His college will definitely be doing online only interviews.