Use these settings to set up how iPhone plays videos on your TV. For more information about using iPhone to play videos on your TV, see Watching Videos on a TV.
Choose iPod and turn Widescreen on or off.
Choose iPod > TV Signal and select NTSC or PAL.
NTSC and PAL are TV broadcast standards. NTSC displays 480i and PAL displays 576i. Your TV might use either of these, depending on where you bought it. If you’re not sure which to use, check the documentation that came with your TV.