That's not free anymore...you have to pay for the antenna and hope you can get line of sight to your local NBC affiliate
Seriously though, there was no technical reason for the streaming Superbowl experience to be as horrid as it was. The stream actually performed much better on my Kindle Fire than on the laptop that was being used to show the game to myself and a few friends. No halftime show and a couple of crappy adds repeated over and over weren't technical failures...they were business ones.
Speaking of technical stuff, the stream was provided by Level3 if I've heard correctly. They have capacity and to spare for an event like this, large though it may be. They just had to turn it up, which they did after the first few minutes of the game.