HandBrake - HandBrake allows users to easily convert video files into a wide variety of different formats.
4k Video Downloader - 4K Video Downloader is a software program that helps people download video files from sites such as Facebook, YouTube and Dailymotion.
Ciano - A simple multimedia file converter for elementary OS.
Video DownloadHelper - Browser extension to download videos from the Web
Any Video Converter - Any Video Converter is an All-in-One video converting tool with easy-to-use graphical interface, fast converting speed and excellent video quality. It allows you to effortlessly convert video files between every format!
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.