The search results indicate that you are likely referring to a technical discovery within the fan community where players can replace the feature.mp4 file (specifically associated with the "feature presentation" screen) to customize the game's visuals. Undertale Feature Presentation Modding
In the context of Undertale , particularly on PC versions, the game uses MP4 files for certain scripted sequences. 876874076983263232 mp4
: Most modern operating systems open MP4s natively via Windows Media Player or QuickTime . The search results indicate that you are likely
If your query is about the format itself, is a multimedia container used to store: If your query is about the format itself,
If you are trying to mod a specific game or app, let me know the or what you want the video to do . A summary of MP4 format's advantages and features - Coconut
: Typically encoded with H.264/H.265 and AAC.
: If a file won't play, you may need to install a codec pack like K-Lite or use a versatile player like VLC .