In the 21st century, we are so used to computers being able to create an image of anything that we forget what a hassle that used to be. For 2D logos, that meant drawing, paste-ups, and photography. For film, it was more complicated because you wanted a 3D effect, or at least some hint or possibility of movement. Co.Design put together several videos and discussions of how TV logos were made of actual physical objects created to brand the channel, then filmed to give them an identity that everyone would recognize. See how the logos of RTF, BBC, and HBO were created.