Hey, I would like to add secure video calling into one of my apps. I would like to build the API around it and only allowed user should be able to access those video calls.

I saw agora or cloudflare realtimekit and those things, but I am not sure if thats works best and also it costs a bit. I have my own vps running and I am pretty sure it can run videocalls. Hosting is at the end on vercel - the videocall stuff can be hosted somewhere else.

What to use to have a good integration with nextjs?