“…live video interviews are now easily gamed by real-time assistance tools.”
I am not too sure about that. Possible, yes. Easily? only if the interviewer sucks at interviewing. If are “gamed” during live interviews, you probably should not be interviewing.
Most interviewers at big cos do in fact, suck. Very by the book, do you know this or that pattern/tool by name. Can you write this or that under time pressure with none of your tool stack.
Sure, and? Generally, someone has to be an interviewer. People dedicated to it are expensive and tend to become useless, results are also not properly measurable so whether one improves at it has nothing to do with whether one thinks one is improving at it.