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VideoDuke – Great Mac video downloader
With support for all popular video-hosting sites like Vimeo, YouTube, Dailymotion etc, VideoDuke lets you download online videos right on your Mac! Different file formats can be set for the downloaded video, including MP3 for audio-only extraction.
VideoDuke also makes it possible to save HTML5 videos without speed or quality limitations so that you can enjoy them on your Mac even offline.