First and foremost, treat it like a regular interview. There is a good chance your recordings will be reviewed by human eyes, especially if you are shortlisted by the AI analyzer. This means you want to look sharp, as you would for any interview, in business casual or smart casual, depending on the company culture.
Similarly, both human reviewers and the AI itself will be paying attention to your body language and tone.
Likewise, make sure you are in a quiet place with no distractions and that you have a stable internet connection before the interview.
You can still take advantage of the interview being pre-recorded, though. Consider making a note with key points you want to discuss and sticking it to your screen for reference during the interview. Use bullet points, not word-for-word planned speeches, because those seldom work as planned.