This is the article which will show you the way how to remove DRM from video for PSP. Follow the tutorial below and you will work out this problem successfully.
As we know videos from the iTunes store or many other marketplaces are protected by the DRM, if you want to remove this limitation, you should get the professional software for help. Just download and install it on your pc and then we could start the wizard.
Start the software and locate the "Add" button on the top left corner of the interface, click it to import the video files where you have saved. If you are not sure the video files you have loaded were the right files, you can click the "triangle" button on the left of the interface to preview it.
Choose the "Common video" option from the "Video files to" drop down list, select the mp4 format as the output format. From the "setting button", you should choose a suitable resolution from the "Resolution" drop down list. If you want to watch the video in a full screen sight, you can select the "Full screen" option from the "Zoom" drop down list.
When you are converting the music files, you can select the mp3 format from the "Common audio" option through the "Audio files to" drop down list, and the rest work is the same as converting the video files. After you have finished the configuration, you can click the "ok" button to save it.
Choose a convenient place to save the converted files from the "browse" button, click the "Start" button and the conversion begin. This process will take a few long time, if you have no time this moment, just select the "Shutdown pc when finished" option. So you can do the following work next time.
After the conversion was done, you can click the "Find target" button to locate the converted video files directly.
Now, you have finished removing the DRM from the video files, the only thing you have to do is transfer the converted video files to your PSP, just copy it to the memory card and put it into the PSP, now you can enjoy it anywhere you like.