How do you play multiplayer on black ops on one console?

To play multiplayer on Call of Duty: Black Ops on one console, you can set up a local multiplayer session by selecting "Multiplayer" from the main menu. Choose "Split Screen" and then add a second controller by pressing a button on it. After signing in or creating a profile for the second player, you can select your game mode and maps to start playing together. Make sure to adjust any settings to enhance your gaming experience as needed.