4K Video Downloader 是一款Mac上YouTube在线视频下载工具，可以下载YouTube上的高清视频，简单易用，很不错！
软件介绍
4K Video Downloader allows to download video, audio and subtitles from YouTube in high-quality and as fast as your computer and connection will allow. If you want that video on your iPad, iPhone or other device we've got you covered. Downloading is simple and straightforward: just copy the video link from your browser and click 'Paste Url'. Done!
软件截图
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