Y2mate is good cloud-based YouTube downloader that supports famous file formats like MP4, M4V, 3GP, WMV, FLV, MO, MP3, WEBM, etc. High speed downloads without registration. I Like the way it downloads the videos directly on the web browser by Inserting "pp" after the word "youtube" in the link to download videos and mp3 files.
Savetube.li - Savetube is the most reliable Youtube video downloader online. Savetube helps to download youtube videos, convert youtube to mp4, extract audio from music videos
4k Video Downloader - 4K Video Downloader is a software program that helps people download video files from sites such as Facebook, YouTube and Dailymotion.
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 Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.
Converto - Easily save videos from YouTube, Facebook, Instagram, Twitter and other sites
Video DownloadHelper - Browser extension to download videos from the Web