"Viacom, the corporation behind MTV, DreamWorks and Paramount is now claiming they own the copyright on a video of an Irrlicht tutorial. Which is completely ridiculous, of course: The whole thing has been written by me and the Irrlicht team, even textures and skins and logos have been created by me, and an Irrlicht Engine user (veegun?) simply filmed and published it on Youtube.com. Here is a screenshot of the tutorial, it's really just a 2D GUI rendered using the 3D engine, nothing special at all."
Here is a thread on irrlicht's forum which contains a copy of the takedown notification. Makes me wonder what exactly about the video tweaked Viacom's interest."