in-R-tube is a tool that allows you to search, download and view YouTube videos.
It was created by Chris Seahorn using KoolMoves and SWF Studio.
You can use in-R-tube to search for videos, watch them and download your favorites to a local library to create your own custom playlist.
Any video viewed from YouTube can be downloaded.
Since videos that are in your library are stored locally, you don't even need an internet connection to watch your favorites!
You can drag and drop Flash video files on the application to either add to your library, or play.
You can drag and drop image files on the application to change the backgrounds. When you reload the app, the last image file you dropped is automatically loaded as your background.
You can take screenshots of any running video. All screen shots are stored locally.
Download in-R-tube from Chris's site: KM-CODEX