The highest video resolution supported by the Panasonic Lumix DMC-TZ58 is 1920 x 1080 pixels. That's over six times the video resolution of a 640 x 480 pixels digital camera, which is the most common video resolution supported by Compact camera digital cameras that were released around the same time as the Lumix DMC-TZ58. A video resolution of 1920 x 1080 pixels is equivalent to Full HD video. You will require a Full HD TV or better to appreciate this level of detail.
This digital camera's video resolution (1920 x 1080 pixels) is in fact the best supported video resolution amongst all similar spec cameras that were launched around the same time as the Lumix DMC-TZ58.
A 320 x 240 pixels video resolution is the worst supported video resolution amongst similar types of digital camera.