I highly recommend using solutions based on WebRTC, which is present in all modern browsers and is really good (see https://www.youtube.com/watch?v=WFil-ZPE0-g for a comparison with Zoom).
Whereby (formerly appear.in) https://whereby.com/ has a really nice and simple system. No more jumping through a dozen hoops, no more installing software with glaring security holes and borderline malware behavior (looking at you, Zoom).
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