Instructions
Turn on your PSP system and navigate to the "Settings" tab in the Xross Media Bar and select "System Settings."
Select "Enable Flash Support" to enable Flash. You will need to connect to a wireless network in order for the process to complete. Flash content will now be viewable through the PSP's internet browser. The PSP supports Flash Version 6, so content that uses newer versions of Flash will not be supported.
Navigate to the "Video" tab in the PSP's Xross Media Bar and select "Memory Stick." From here you can view all of the compatible videos stored on your PSP's Memory Stick. Select the video by pressing "X" and it will play.