The filename appears to be a corrupted encoding (mojibake) of the Korean phrase "흑마" (Heuk-ma), which translates to "Black Horse."
If you are looking for a or dialogue from this specific file, please clarify: 흑마_20190714.mp4
It may be a short clip or "piece" from a 2019 equestrian event or a stock footage snippet of a black horse, many of which were uploaded or tagged around that specific timeframe. The filename appears to be a corrupted encoding
Did you find this file in a (e.g., a gaming forum or a K-pop archive)? 흑마_20190714.mp4