(e.g., a specific website, a USB drive?)
A robust tool to transcode the file into a standard H.264/AAC MP4, which will resolve most compatibility issues. Common Use Cases
(e.g., error message, no sound?) APE 2018 and .mov files - Adobe Community _XcOKw5G45KYoHqVmp4_ape_mp4
To help you further, could you provide more context? For instance:
Specialized video equipment (e.g., TriCaster) can produce unique file structures that need transcoding for standard editing software. A free program to inspect the technical details
A free program to inspect the technical details (container, audio/video streams) to identify what is actually inside the file.
Storing lossless recordings in an MP4 container for streaming. a specific website
Based on your request, "_XcOKw5G45KYoHqVmp4_ape_mp4" appears to be a technical file designation, likely referring to a media container conversion (converting Monkey’s Audio ".ape" to MP4) or a specifically named video file from a unique, possibly proprietary source (like a broadcasting TriCaster).