So i was noticing that some people don´t know how to do it, so i made a research and found out, and i want to share. [Creating a gif from a youtube/vimeo/vine video] [Optimizing the gif(making acceptable to css´s sprays)] Source engine only accepts 512kB gifs, so you need to reduce that to be acceptable. If your gif is that size or smaller, skip this process. [Converting to .vtf & .vmt] Now, you can put your spray in CSS folder or put it in game. Thanks for reading, and sorry for any mistakes.