The DSC-TX200 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 cameras that have been available for around the same time as the DSC-TX200. 640 x 480 pixels is also supported by this Sony digital camera. In addition, this digital camera support a video resolution of 1280 x 720 pixels and 1440 x 1080 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 resolution is in fact the best supported video resolution across all similar spec cameras that have been available for around the same time as the DSC-TX200.
Across similar types of camera the worst supported video resolution is 320 x 240 pixels.