You can't do this because the Digital Copies coming with Blu-ray/DVD discs are also locked by DRM.So if you want to play your Blu-ray/DVD Digital Copy movies on Galaxy Tab, you need to remove DRM from the videos first and then convert them to Galaxy Tab compatible MP4 files.
To get the work done, a DRM converter is needed. Here Pavtube ChewTune is highly recommended to help you convert protected Digital Copy to DRM-free MP4 for play on Galaxy Tab. With it, you can effortlessly make your Digital Copy movies playable on Galaxy Tab in just a few mouse clicks in Windows (Windows 8 included) XP/7/Vista. Now just download it and have a try.