eli5: What really happens under the hood when we get to video chat in real time to someone that is on other side of world?

Question

I’m wondering how is this information actually transferred, how it can be that fast that we can see without any latency at all.

Thanks in advance,

In: 20

Answer 1

You both connect directly to each other using an internet communication protocol called UDP and each others IP addresses, and then simultaneosly transmit picture and sound to each other. That’s how it works online.