One of the best things about using the Steam Deck is its software, as Valve makes it extremely simple to tweak all the settings you want. Even things like changing the boot-up animation on the Steam Deck is quite a simple process thanks to the official support that arrived for it in an update. The boot-up animation is the splash screen that appears when you turn on your Steam Deck. By default, it displays the Steam Deck logo, but you can replace it with any WebM file of your choice that lasts up to 30 seconds.