How did I not realize this before? YouTube is officially in 3D! You can upload 3D video and everything, assuming you have a stereo camera setup, which almost nobody has... YouTube - 2010 Reno Nevada Great Balloon Race pt 1 of 4 Canon DSLR Inter Video 3D Lite yt3d:enable=true You have to click through to YouTube to see the 3D options. They are on the lower right hand side to the right of the quality option. YouTube - A Christmas Carol 3D Trailer (yt3d:enable=true) EDIT: Enable "Crosseyed" mode and cross your eyes while watching. Focus in on the image in the middle (you'll see three images) and after a few seconds you'll be locked into a 3D viewing.