iSkysoft Free Video Downloader is a program for Mac users who wish to download YouTube clips to their local directories for offline playback. This application brings you a very intuitive interface, provides you with easy to configure output settings, and comes with an integrated player where you can watch the downloaded videos.
All you need to do in order to work with this app is to paste the YouTube URL of the video you wish to download and the program will automatically get the job done. However, I recommend you to configure the output settings from the Preferences menu before launching any download process.
I like the fact that this downloader allows you to choose the proper video quality for the output file (from 240p up to 2160p). All videos are saved as MP4 files and you can watch them as soon as the app completes their download directly from the program's interface.
Nevertheless, iSkysoft Free Video Downloader lacks plenty of useful features. For instance, the app doesn't allow you to save the output files to other formats than MP4, it downloads clips only from the YouTube website, and fails to download more than one clip at a time (doesn't offer you support for batch processing).
Briefly, you could try this program as long as you're satisfied with the amount of features iSkysoft Free Video Downloader has to offer you. If not, I'd say you should check out a similar app from the same developer that offers you all advantages that are missing from iSkysoft Free Video Downloader.