Great Downloader easy to use can convert into multiple file formats. Fast and impressive
MetaX for Windows - MetaX for Windows, port of https://alternativeto.
Video DownloadHelper - Browser extension to download videos from the Web
MyMeta - MyMeta is a Windows 8 / Windows RT App for editing metadata and artwork on MP4, M4V and MOV media...
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
HandBrake - HandBrake allows users to easily convert video files into a wide variety of different formats.
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.