Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Video Hub App - The fastest way to browse, search, and manage videos on your computer. Like YouTube for videos on your computer!
Video DownloadHelper - Browser extension to download videos from the Web
VideoJS - VideoJS is an HTML5 Video Player, built with Javascript and CSS, with a fallback to a Flash video...
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
FacePause - Look away to pause YouTube videos
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.