: In some online circles, users post short video clips labeled as "useful" ironically or as a way to "save" a thread with a specific reaction video.
: Forums for software like vMix often have threads where users thank each other for a "useful post" regarding video codecs or MP4 recording settings. tsunl_9.mp4
Based on available information, does not appear to be a widely recognized viral video or a standard technical term. The filename structure and the "useful post" tag are common in niche communities (like Discord, Telegram, or private forums) where files are shared for specific tutorials, meme templates, or software assets. : In some online circles, users post short