Hey movies! Yeah! Ideas (parental warning: may not be suitable for children under 17):
1. Domination victory: film starts like the intro film to Tom Clancy's Rogue Spear, (insert how you behaved during the wars) except shows you fighting palace guards, then finally entering the room where the opposing leader shoots himself. If you used nukes, start with a shot of the opposing leader hiding in a bunker, followed by mushroom cloud, and debris falling, then cuts to the above scene.
How you behaved during the wars:
Several to choose from. How many times you pop rushed and starved citizens. If you were brutal with putting down resistance you see mass executions. If you were slow putting down resistance, you see unhappy citizens.
2. Cultural victory: film shows sparkling cities, all of your wonders, happy citizens.
3. Diplomatic victory: film shows inside the UN, deal making, bribes, then the vote.