: Check the file's MD5 or SHA-1 hash on platforms like VirusTotal or Hybrid Analysis . Sometimes, malware or specific CTF samples are indexed by their hash rather than their original filename.
: 2021-06-27_02-52-12 indicates the file was likely generated or saved on June 27, 2021, at 02:52:12 (local or UTC time). video_2021-06-27_02-52-12-yKyUtmyL.mp4
Public records for this specific filename do not point to a widely documented "flag" or solution for a Capture The Flag (CTF) challenge. However, files with this exact naming format from June 2021 often appear in: : Check the file's MD5 or SHA-1 hash