Location videos contain city skylines, monuments, and other geographical landmarks. All videos can be used for personal (offline) projects for friends and family. Usually restrictions apply for businesses and published (online) projects like blogs. Read each web site's "copyright notice" or "user agreement" before using.
US National Park Service B-Roll Video
"Downloadable, QuickTime H.264 movie clips are available as zipped files that can be decompressed for use in video editing applications, web sites and other projects. All video clips are public domain."