This is an independently made video that was posted on Youtube to pay tribute to those effected by the events of September 11th 2001. It uses images from the attacks as well as those in mourning as a result. There seems to be a focus on the emergency services that tried to save people on that day. The use of "How to save a life" by the Fray is very suitable for such a video.
The final quote in the video is "We will live our lives as Americans". This is highly symbolic and helps define what it means to be an American. They will remain strong in the face of adversity.