Keepv.id - Keepvid is the best online video downloader. Here you can download videos from 100s websites: Youtube, Facebook, Instagram, Twitter, etc.
MiniTool uTube Downloader - Download 4K YouTube videos
y2mate.tv - Y2Mate YouTube Converter is not just a video converter, but also an audio converter. You can easily convert YouTube videos to the format you want, such as MP4 (320p, 480p, 720, HD 1080p), 320kbps MP3, M4A, WEBM, etc.
Xilisoft Video Converter - Xilisoft Video Converter is easy, fast, reliable, and loaded with features.
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Freemake YouTube to MP3 Boom - Freemake YouTube to MP3 Boom is a powerful solution with which you can select a YouTube video and convert it into MP3 within seconds and with the press of a button.