YouCube offer an interesting way to see multiple Youtube videos in the form of interactive 3D cube. You can load upto 6 Youtube videos each playing on either side of the cube. Click on the buttons on the left side and enter specific Youtube video URL.
Similarly, you can add different Youtube video URLs (upto 6) and let them play on each side of the cube. You can rotate and move the cube playing videos with mouse. It also allows you to save your video cube or browse cool 3D cubes created by other users. Checkout YouCube [via] for cool interactive way of watching Youtube videos. Here is the video preview: