iTube HD Video Downloader offers the best option to help you download entire playlists from YouTube to your Mac. It comes with a slick add on for the Safari and other browsers that allow you to download video from YouTube, as well as over 10,000 different video streaming sites, without paying a dime. It also features the ability to convert downloaded video into any format you fancy so that you can play them seamlessly on mobile devices such as the iPhone and the iPad. Moreover, the application features preset for Apple iPhone, iPad, and iPod to make YouTube to iTunes easier. This means that you can set your output format directly to suit your needs.
First download and install the YouTube playlist downloader. When fully installed, launch the program in the background. And then move to next step to start downloading.
Now visit youtube.com and look for the YouTube playlist or channel you are interested. When you open the playlist, you will see the "Download All" button on the top right of the playlist. You can use it to download the whole YouTube playlist or channel.
Click on the "Download All" button, and it will bring up a dialogue box asking you to check the file you wish to download. Check the videos and set the output resolution. And click "Download" to start downloading all selected videos to your Mac. Then you can free play YouTube playlist with no ads now.
Tips: If the "Download All" button doesn't appear on Mac, go to browser preferences to verify that the iTube extension exists and is enabled.