There are plenty of apps for the Mac that capture YouTube videos. The problem is that YouTube isn’t the only place on earth with videos worthy of downloading to a collection. After dinking around with a dozen different YouTube video captures apps I settled on Downie. Why?
First, Downie is the easiest to use downloader app. Second, Downie downloads videos from just about everywhere on the web. The list is huge and covers everything from PBS to Vine to Viemo to ESPN. Dozens of sites.* Drop on a URL and Downie does the download.
Downie takes the URL, connects to the site, and begins the download. You can save the video wherever you want on your Mac, and even drop them into iTunes (you may need a video converter) for use on Apple TV.
Previous to Downie I used MacTubes, which is free, but only does YouTube video downloads. What Downie is missing is a converter and a way to transport videos to iTunes.