How to change background in CS:GO main menu - panorama ui
If you are tired of the familiar background in the main menu of the CS: GO game, then there is an opportunity to change it. In order for you to be greeted with a different background when starting the game, you need to change the necessary files. With each update, the background can change and therefore you need to adjust and change specific videos. See what to change below.
So, first you need to go to the Videos folder, which is located along the path: C:\Program Files (x86)\Steam\steamapps\common\Counter-Strike Global Offensive\csgo\panorama\videos