How to Change the Steam Deck Startup Movie
It's super easy! Just make sure you've got Developer Mode enabled on your Steam Deck. Then, navigate to the Steam > Settings > System and toggle on the Developer Mode. Once you've done that, you can replace the startup movie file in the system's directory with your video. Make sure your video has the same name as the original file and is in a compatible format. Boom! Custom startup vibes.
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Just drop a new video in there with the same name, but honestly, why mess with perfection? The original startup movie has a charm to it!
Pro tip: Keep a backup of the original startup movie file. If anything goes sideways or you change your mind, you can always switch back to the classic startup experience.
As someone who's tried this, make sure your replacement video isn't too long. You don't want to be sitting through a feature film every time you turn on your Steam Deck!
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