Things You'll Need
Instructions
Download the VideoDownload Helper add-on program for Firefox. This application can be found on the "Add-ons" portion of the Mozilla website under "Download Management." This will allow you to capture videos on YouTube.
Visit YouTube using the Firefox browser and find the video you wish to put onto your PSP. Click the icon on the bottom of the browser that resembles a video clip and a computer disc. A pop-up will appear with the URL of the video. Right-click the box that says "Download Link" and select "Save Link As."
Access the PSP Video 9 website at www.pspvideo9.com and download the program. This program will allow you to convert the YouTube video files into the PSP format.
Launch PSP Video 9 and choose "Convert" from the menu on the left of the program. Click on "One Click Transcode" and select the video file you downloaded from YouTube.
Connect your PSP to your computer using a USB connector cable. Select "USB Mode" from the far left of the cross-media bar on the PSP. Your PSP will be detected by PSP Video 9. Choose the file you converted and select the option "Copy Video to PSP."