: Convert the file to a more robust, "edit-ready" format like Apple ProRes 422 Proxy .

: There is a known script/download called " A Computer Prepares " provided by Figure 53.

If you are using for video playback, the term "prepare" often refers to a specific optimization process:

: This is a common error when trying to play a script-generated MP4 of this resolution; it indicates the video player cannot handle the codec or dimensions.

Large or non-standard MP4 files often use streaming codecs (like H.264) that professional playback software or specific operating systems (like macOS) struggle to decode.