If you connect to the Internet using a router then you have a local IP address in the form of 192.168.x.x and you have a public IP address which is the one the router is holding up, so if you have a web server or a live video server, if you want to host servers of any kind you will need to do port forwarding.
Port forwarding is like a bridge between your local IP address to your global IP address. After programmed some user on the Internet connects to your Global IP address on some port, if that port is set to forward to your PC and port then the content will be accessible.
What most people don’t know is the website portforward.com where you can find instructions to program port forwards for your specific manufacturer and model of router. They have them all and in this video I made bellow I show you the steps you have to take to get to instructions for your particular manufacturer model router.