What are some alternatives?
youtube-dl - A small command-line program to download videos from https://alternativeto.
SaveFrom.net - Free Online service to Download YouTube videos at one click! The best YouTube Downloader supporting fast and easy vimeo, Facebook and Dailymotion video Download and much more!
Youtube-DLG - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
ClipGrab - vanbittern entwickelt individuelle Weblösungen.
4k Video Downloader - 4K Video Downloader is a software program that helps people download video files from sites such as Facebook, YouTube and Dailymotion.
Video DownloadHelper - DownloadHelper is a tool for web content extraction.