Instructions
Navigate to your DSi Brower and tap the "Start" button.
Tap on the "Search" button. Type in "Home4DSi" in the textbox. Tap on the "DSi Homepage" link. You can also navigate directly to "http://home4dsi.webs.com/menu.htm" by typing the address into the address text box.
Tap on the "Go Inside" button.
Tap on the "DSiTube" icon. Click on the "Go to DSI Tube" button.
Select a category to view from. You now have access to DSiTube.