Snk_cs_15.mp4

or Attack on Titan 2 : These games by Omega Force/Koei Tecmo are frequently abbreviated as "SNK" in fan communities. Cutscenes in these games (such as the transformation of the Colossal Titan) are often cataloged as "cs" files in the game's installation directory. Usage and Troubleshooting

: Standard abbreviation for "Cutscene" or "Cinematic Scene." snk_cs_15.mp4

Given the "15" in the name, this could be a story mode cinematic or character ending from the 15th installment of the KOF series. or Attack on Titan 2 : These games

: The numerical identifier for that specific cinematic in the game’s chronological order or asset list. snk_cs_15.mp4