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MassTube is a free, intuitive and easy-to-use video grabber & downloader from Spain. It can help you easily and quickly download multiple resolutions (240p, 360p, 480p, HD 720p, Full HD 1080p, 4K 3072p, …) and formats (FLV, MP4, WebM, 3GP…) of videos from the world’s largest regular video website YouTube, and the most popular adult video websites XVideos and RedTube.