Mostly, these videos come from music/movie trailers to TV shows and even online lessons to tutorials. YouTube is a video-sharing website on which users can upload, view and share videos. 3.3 What formats are supported by Video Download Applications?.3.2 Is it safe to use YouTube Video Downloader?.3.1 Why use a YouTube Video Downloader?.Part 3: Frequently Asked Questions (FAQs).Part 2: What is the Best YouTube Video Downloader without Copyright?.Part 1: Top 5 Free YouTube Downloaders with No Copyright.