The Panasonic DMC-TZ55 supports a maximum video resolution of 1920 x 1080 pixels. That's over six times the video resolution of a 640 x 480 pixels camera, which is the most common video resolution supported by digital cameras that have been around for a comparable time to the DMC-TZ55. 640 x 480 pixels is also supported by this Panasonic camera. In addition, this camera supports a video resolutions of 1280 x 720 pixels. 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.
A 1920 x 1080 pixels video resolutions is in fact the best supported video resolution across all digital cameras of this spec and age.
The worst supported video resolution amongst similar types of camera is 320 x 240 pixels.