Practice simulator
Practice a one-way interview under real conditions
The hardest part of a one-way interview is the format, not the questions. So rehearse the format. Pick a role, get questions one at a time with the same think-time and record-time pressure, and get used to talking to a lens that does not react.
-
Nice. That is the format beaten.
Score yourself honestly against the things reviewers actually notice:
How to get the most from this
Do it twice. The first run is just to feel the silence and the timer. The second is where you actually improve, once the format stops being a surprise. If you turned on recording, watch one answer back. You will spot the eyeline and the filler words faster than any feedback could tell you.
For the tactics behind a strong answer, read how to pass a one-way video interview and the STAR method under a timer. If the nerves are the real problem, start with beating the dead-camera anxiety.