Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Livestreamer - Livestreamer is a command-line utility that pipes video streams from various services into a video...
Video DownloadHelper - Browser extension to download videos from the Web
Streamlink - Streamlink is a fork of the discontinued livestreamer project.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
StreamBuffRe - StreamBuffRe buffers online streams and redirects them to different destinations.
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.