level up to the highest level on your lot (roof view) make sure you have your roof on (all walls up).
press tab to put your game in cameraman mode
press and hold the Q key to sink down into the shot. Use your mouse to adjust your POV
Once you're in cameraman mode, you'll need to use your keyboard to control your field of vision as it takes away the UI (user interface).
Read more here for your camera (field of vision) controls
http://www.sims2wiki.info/wiki.php?title=Tutorials:Taking_Totally_Bitchin_Pics#Camera_Controlsc key will take your pictures
v key will start recording video , press v again to stop.