YouTube Viewer is a reliable and efficient free gadget for Windows, automatically updated and configured by you to display videos you may be interested in.
Among the criteria you can use are “top rated”, “top favorites”, “most viewed”, etc, — and by Category (“autos”, “comedy”, “films”, “music”, “news”, etc).
It will also let you display videos according to a search term you can choose at will. Note: to close the Viewer pane just click anywhere on your desktop.
Check also YouTube Exact, a free on line service that will help you create references to specific parts of large YouTube videos.