For Hangouts replacements there are quite a few WebRTC video conferencing sites that can work with URL sharing and either with or without accounts. I regularly

For Hangouts replacements there are quite a few WebRTC video conferencing sites that can work with URL sharing and either with or without accounts. I regularly use https://meet.jit.si https://meet.jit.si https://appear.in/ https://appear.in/ and https://appear.in/ https://appear.in/