: This is likely the username or handle of the content creator or the person who uploaded/archived the file. There is a profile for 4horlover on Last.fm which suggests they may be involved in music or media sharing.
: IDs like "KOC" are sometimes associated with specific production labels or cataloging systems for independent video creators. 4horlover___KOC387.mp4
: This usually functions as a specific identification code (ID) for the video, often used by creators to organize their library or by specific websites (like niche video platforms) to catalog content. Potential Contexts : This is likely the username or handle