Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.
Video DownloadHelper - Browser extension to download videos from the Web
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
ClipGrab - A friendly downloader for YouTube and other sites
FlashGot - FlashGot is a browser extension for Mozilla Firefox that is designed to make it easy to download a whole batch of files in one go. The extension is open source and free to use, but it is no longer compatible with the most recent version of Firefox.
Freemake Video Converter - Freemake Video Converter Converts 500+ Formats & Gadgets FREE! Convert to MP4, AVI, MKV, WMV, DVD, Xvid. FREE Download. **Voted Best of 2018** Comes with FREE…