When storing video on the card a strange file naming convention is used. All video files and thimbnails need to be stored in a folder called: /MP_ROOT/100MNV01.
Each video in this folder is represented by an data file and a thumbnail file called: M4V00001.MP4 and M4V00001.THM. The 00001 component of the file name is incremented for multiple videos.
The thumbnails are simple 160x120 JPEG images stored with the .THM extension. Note that the title of the video is stored in the header of the file.
Conversion Tools
1. Download the latest versions from office website:
http://www.pavtube.com/video_to_psp/ and run Pavtube Video to PSP Converter and you will see its main interface.

2. Import the videos to the file list by clicking Add button. Then you can edit the list using the buttons under the list.
3. Open the profile drop-down bar to select the target conversion format for playback on PSP player. After this, please open output drop-down bar to specify where to save your converted files.
4. Previewing the video is a good choice for you. Under the preview window, you can click the button to capture the still pictures to save on your PC for enriching the picture collection.
5. Edit the videos
Effect:

Adjust brightness, contrast, volume for video and audio. In addition, you can tick to modify the image effects in flipping and deinterlace.