Great Downloader easy to use can convert into multiple file formats. Fast and impressive
AWS Elemental Server - AWS Elemental Server provides fast and reliable video processing for file-based workflows.
Video DownloadHelper - Browser extension to download videos from the Web
Coconut - Coconut is a cloud video encoding solution, built for developers.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
Mux - Video performance analytics for online media and developers
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.