How it works is that it is a downloader tool and once you install it (and by the way, it works for Windows and Mac) you simply find the video you want. There will be a floating download tab and you simply click it to download your video. It's as simple as that.
You can even download the videos from various popular video hosting websites like YouTube, Vimeo, Hulu, Dailymotion, LiveLeak, Metacafe and more. Now you can have any video you want from a variety of places when you want it.
To download NBC videos, click here.