Click "Add Files" button, then it will find your iTunes library automatically. Choose the videos you want to bypass the DRM from. You can also drag and drop the videos from iTunes library folder.
 Click "Convert" button, then TunesKit will start to work. The conversion will be finished soon. Once it's done, you can find the output files under the "Converted" tab or by clicking "Open" button. Now, you can copy the iTunes videos to external driver with no DRM at all to external driver freely. It can be played anywhere you want.
Import iTunes videos to TunesKit for Mac.
Remove DRM From iTunes M4V videos.
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