I've talked to an acquaintance who is a PD.
Some of these things have already been said 🙂
1. Invest in a decent camera if your computer doesn't already have one. Yes, spend $50.
2. Get some ancillary backlighting. Yes, spend $20.
3. Read some articles on how to be charismatic on Zoom. I know it sounds silly but this is a new beast. Things like looking into the camera (not the screen), nodding more, etc can make you look polished.
With COVID and virtual interviews, a whole lot more applicants can apply to a program. Simply because there are no travel restrictions, logistics of requesting a day off, etc. Therefore, an applicant should be ready to :
a) answer why exactly that program. There won't the usual be a meet and greet with the fellows, lunch, and standard PowerPoint presentation of program facts. So, it is on the applicant to gather this info (or ask for it beforehand). And, since you only have X minutes you have to cut to the chase rather quickly. Gone are the interview days where you can ease into the process and build-up to the key points.
b) have their letter writers follow up. Why? Because some interviews and programs can't really feel out the vibe of applicants via Zoom. So, they'll turn to your letter writers to see what they think of you. So, the applicant may want to consider dropping a note to the letter-writer or following up with them.
c) reach out to the fellows. For me, the informal parts where fellows would talk to applicants always provided the most information. Obviously, there are hang-out rooms and stuff with fellows but it isn't the same. Applicants can consider getting contact info from the fellows and following up with them to speak 'off the record.'
Good luck everyone!