What are some alternatives?
When comparing Youtube Video and Audio Downloader and Offliberty, you can also consider the following products
youtube-dl - A small command-line program to download videos from https://alternativeto.
y2mate - Y2mate.
Youtube-DLG - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
YouTube MP3 - Convert YouTube videos to MP3 music 320 kbps without any software
Video DownloadHelper - DownloadHelper is a tool for web content extraction.
YoutubeDownloader - YouTube Downloader is a best in the class video downloader for the Opera web browser.