It's simple, you need to install TeamViewer, and during installation, check the "additional options" box, then click next... and check the box for "install VPN driver," and that's it. The other person should also have the VPN driver installed. When connecting, select VPN in the menu (in the remote control tab, under the partner's ID).

... and at the same time, set up a two-way conference :D old good hot-seat)

Regarding providers, there's no arguing, sometimes there are issues, but if there's no ping, you can still play. It's just that when the speed reaches a certain threshold, the connection cannot be established. For example, no matter how hard I tried, even with a full signal from the operator on 3G in Moscow, I couldn't get a stable tunnel. GR will also lag, but even more.

But in general, thanks to Andrey))