'2.6k mangs killed' is a 1v1, human (Turks) against computer (Mongols) in the Imperial Age on a revealed flat grass1 map with gold, stone, forage bushes and wood in abundance in the south, near the human player's base. The computer player starts in the north with castles, siege weapons and Elite Mangudai but no villagers.
The author states the purpose of the submission in his description, to show that the Elite Mangudai is not as good as another upload to the blacksmith pretends and that the computer is easy to beat, even with many buildings, resources and units. Moreover, that he lost only siege weapons, towers and castles and killed 2.6k Elite Mangudai.
The game does not show the intended goals, the Mongols attack with three squads, no siege weapons needed, kill most villagers, raise two town centers, and destroy all siege weapons of the human player. The player quits loading a saved game when the computer attacks the last town center, bombard towers and castles after 22 minutes. Other than intended, the game rather supports ID 7378 Why the Mongols are the best civilization by TrevorusKhan instead of disproving it.
Apart from needing a specific and defined purpose for the upload, a viewer should gain knowledge or entertainment value from a recorded game. Other than watching the human player trying to fake exploration with cavalry units and placing watch towers on a revealed map I missed entertainment. The inexperienced player can learn not to underestimate the standard AI, that a recording discontinues whenever the player loads a saved game, to detect if a player used a revealed map by clicking 'fog of war' and to view a file at least once before posting.