TunesKit for Mac is a utility that comes in handy if you need to remove DRM protection from your iTunes movies. After using this program, you will be able to transfer the generated media files to your iPhone or USB stick or share them online.
The application comes with a user-friendly interface, communicates well with the iTunes utility, and supports a wide variety of video formats. What's more, it can preserve the subtitles that were attached to the imported iTunes clips as well as the video's original quality. Another important aspect is that you can process multiple clips at the same time, without slowing down the performance of your system in the process.
In my testing, the program took more than 10 minutes to convert a 4-minute clip. So, you might need to wait a while if you need to remove DRM protection and convert a large iTunes video.
Furthermore, the application is a bit pricey and requires the latest iTunes version to be installed on your Mac in order to work properly.
Hence, in my opinion, you should try a different Mac application for converting DRM protected clips from your iTunes library.