It's worth checking out the technology that will be used for your online or virtual interview in advance. Don't leave this until the last minute. If you can access the system and do a trial, I would encourage you to do so - or practice using a system you do have access to. Check that you can hear and check that you can be heard. Use a headset with a microphone if possible. Using a headset cuts down on background noise, helps you with hearing your interviewer(s) and makes sure you don't have to raise your voice to be heard. When interviewing online, I have had some less than wonderful situations - such as the candidate who ended up in her back garden trying to get a better signal and we could barely hear her over the traffic sounds. Not the best for either her or the interviewers. Set yourself up for interview success by checking out the technology in advance.
My interview tips are based on my years of interviewing experience and my years of interview coaching. I hold qualifications in HR and Business Psychology.