Though we are on the internet all most every minute, sometimes, we still need to download videos from YouTube. Music lovers can download music video from YouTube and convert to MP3 to play anywhere they want without streaming from internet. Self-made YouTube videos are mistakenly deleted and you need to download them from YouTube channel for other use.
Now new with OS X Yosemite 10.10, it seems a little bit difficult to download YouTube videos as the YouTube downloader you familiar with no longer works in Mac Yosemite. Then how to download and convert YouTube videos in OS X Yosemite?