Do not go to a coffee shop or library; there is a lot of potential for distraction.
You want to convey the impression of a professional home office. Set up your camera to provide a pleasing, professional image.
Carefully check the camera angles. Look very carefully what is in frame.
- Have the camera at eye level. Don't make the mistake of having your laptop on your lap and looking down, or you will give your interviewer will have a nice view up your nostrils.
- Set up a professional background. Maybe a plant, motivational poster, your framed degrees, etc.
- Close any doors in the background. Open doors leading to dark hallways can be distracting
- Check your lighting. You want the frame to look nice and bright; no dark shadows. Indirect sunlight is best; some nice warm lamps also work. Google photography lighting tips. Even consider lighting a few candles in front of you (out of frame, of course). They provide a nice warm light.
- Get pets OUT. The last thing you need is Fluffy meowing and jumping onto your lap, or Fido barking when you're trying to win the job.
- Don't skimp on audio; make sure your audio is clear and crisp.
- Get a decent headset. I don't work for Arctis, but their SteelSeries headsets are great.
- Solid colors look best on camera
- Look at some newscasters and see what they wear.
Be sure to test with a friend or two before the interview.
If the opportunity exists to work from home/remotely, they will be looking at your home office setup. If it looks sketchy, it will cost you.
I learned a lot of this the hard way. It resulted in a job offer, based on the online interview.
Hope this helps. --Miklas