Looks like the grand daddy of video calling SKYPE has responded to the surge in use of video over the past few weeks, by making its product way simpler to use. There is no complicated signing up or downloading and installing of software anymore. So long as your computer has access o a camera, microphone and internet you should be good to video conference go.
ZOOM has been getting bad press from it's video calling app recently and although some of the claims have been a bit outlandish it seems to be not doing so well on it's privacy and data sharing issues. Maybe give SKYPE a go as an alternative.