It is stressful, sympathies, but on the plus side it's the same for everyone and panels are usually understanding and sympathetic to the difficulties.
First thing I would do is really take some time to familiarize yourself with the tech, how it works etc well ahead of time. Download the software onto the device you intend to use, whether that's a phone, tablet or laptop, and get a friend or family member to do practice calls with you, do the whole process from receiving the invitation (usually on an email), to clicking through to the meeting - you may be placed into a 'lobby' to wait to join the call so don't be disconcerted if that happens - and then talking and doing Q&A and finally leaving. Make sure your microphone and camera works so they can see and hear you, you are in a well lit area but without any lights pointing direct at the camera and that the camera is at the right angle, so you aren't shrouded in darkness, accidentally blinding the panel or angled so they can only see your left eyebrow 
. Do not be disconcerted if you feel you look awful on the video, its the same visceral reaction I find to hearing yourself on a voicemail or answer phone or similar, everyone feels they look terrible but no-one else will notices all, they are probably too busy worrying about how bad they look themselves!
Choose a background/seating position with a backdrop which is professionally appropriate (ideally no pants drying behind your seat!), plain and non distracting (a plain white wall is best IMO). Check your wifi is fast enough to cope and doesn't constantly cut out, if it does you can try hotspotting through your phone or buying a dongle for mobile internet which can sometimes work better. The more comfortable you feel with the tech in advance the better you will perform as having to fiddle around with your mic and camera for the first 5 mins of an interview is not only stressful but also cuts into your time to actually answer questions!
On the day itself, dress as smartly as you would for an 'in person' interview (on the top half at least, they won't see you below the waist so you can wear PJ bottoms if you like ). Get your family to ensure they are quiet and don't distract you during the call itself and shut any noisy pets into another room. You will normally be able to see the whole panel during the call, and they will all see you, but they will make it's clear who is talking, often whoever is not speaking will mute themselves so you don't get background noise from their houses!
In terms of tips, I'd say do try and look into the camera rather than down at your keyboard, and use positive, open body language as you would if you were in a room with the panel, it's hard to make proper eye contact over Zoom/Teams but do try and at least look in their general direction! Despite this it is perfectly possible to build a good rapport and sell yourself using the software, you do it in much the same way as you would in person, smile, be as relaxed and natural as possible, engage in some light small talk, give clear and relevant examples of where you have met the job competencies etc etc.Talk nice and slowly and clearly, it can be harder to hear over Teams if there is any interference on the line and be prepared to repeat yourself if they didn't always hear you 1st time. Do make sure to structure your answers carefully, I am a bit of a 'waffler' especially if nervous, the trouble with teams is you won't necessarily pick up any non verbal cues that they've heard enough and want you to stop talking as easily as you would in person. Do feel free to pause and ask if they would like any further detail when you get to the 'end' of an answer to find out if they would like to hear more, try and avoid trailing on and on until they interrupt you if at all possible!
Good luck!