The _source suffix indicates this is the original, high-quality upload before it was compressed or transcoded into different resolutions (like 720p or 1080p) for streaming.
If this was part of a URL, the surrounding webpage or the folder name usually contains the human-readable title. 0gzyeihecpkhhq84nggsa_source.mp4
However, based on standard naming conventions for media platforms, this file likely corresponds to: The _source suffix indicates this is the original,
The "proper text" or descriptive title for the file depends entirely on the context of where you found it, as that alphanumeric string is a unique identifier typically generated by a server or content management system. 0gzyeihecpkhhq84nggsa_source.mp4