If you love to watch the Olympics, this is your year: NBC is pumping out more than 5,500 hours of video for your TV and digital devices. We’ve covered that before — but how do you go about watching? Here’s a guide to how you can keep up with the Summer Games. Sign-Ups Required: Like most things that are “free,” you need to sign up before you can watch live video online. To do that, you should have an account with a TV provider that includes MSNBC and CNBC — and know your user ID and password for it. Visit the NBC Live Extra page to sign up. Read the full story at NPR.