Things You'll Need
Instructions
Download the Vdownloader program on your computer. Open the Vdownloader file and follow the prompts on the screen to install the software. Run the Vdownloader program when finished.
Press the "Search" button on the left menu in Vdownlader. Select the "AVI" option from the drop down box labeled "Output Format." Use the "Search Video" bar to search for a YouTube video to save. Click the "Download" button underneath the video to begin downloading and converting the video.
Open the Moonshell folder. Find, and open, the dpgtools folder. Run the file dpgenc.exe. Drag and drop the YouTube video file into the blue rectangle of the dpgenc program. Avoid copying, moving or altering the videos until the program is complete to prevent corrupting the file.
Insert the micro secure digital card into the card reader. Connect the card reader to your computer, following the manufacturer's instructions if needed. Extract the contents of the Moonshell archive onto your computer. Copy the Moonshell folder and Moonshell.nds file on to the card.
Copy the converted .dpg file on to the micro secure digital card. Remove the card from the reader. Slide the card into the appropriate slot on the third party flashcart. Place the flashcart into the Nintendo Dsi's game slot. Turn the Nintendo DSi on and run the Moonshell.nds homebrew file. Select the video file from the menu to play.