When you play visual novels on a Steam Deck, you may experience video codec errors, video skipping, or even see a "test pattern" placeholder instead of actual video playback. This issue occurs because the standard Proton version from Valve lacks certain proprietary video codecs that many visual novels rely on. Fortunately, the solution is straightforward: you need to install `GE-Proton` (a community-enhanced version of Proton) via `ProtonUp-Qt`, which is available in the `Discover` app, and then apply it to your game. For detailed installation instructions, please follow [this guide][GE-Proton Guide].
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