Preparation
Make sure you have a copy of your resume in front of you as a reference
Practice walking through your resume in a concise manner, you should be able to do this in roughly 3 minutes.
Go a little deeper and refresh on your past roles and companies so the recollections are fresh sometimes it’s the little details that make an answer
Location
Find somewhere with good lighting & low background noise
Ideally a simple background so there are no distractions for you or for the interviewer
Think more about what might distract you, like having your phone on silent
Personality
Think about your eye contact, try to look directly in the camera when speaking not at the recording of yourself
Speaking clearly with a calm speed
Don’t forget your personality just because you are talking to a computer, try to imagine how you would be receiving this as another person
Body Language
Reiterating on the above; eye contact is through the camera makes a huge difference & remember to smile!
The picture frame can include your upper body allowing your hands in the recording might help accentuate a point you are making
Posture is really important in how your are perceived but also in the delivery of what you are saying