The highest video resolution supported by the Olympus TG-620 is 1920 x 1080 pixels. That's over six times the video resolution of the most frequently found video resolution of 640 x 480 pixels (which is also supported by this camera). This Olympus camera also support a video resolution of 320 x 240 pixels and 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.
This digital camera's video resolution (1920 x 1080 pixels) is actually the best supported video resolution amongst all cameras of a comparable spec and age to the TG-620.
The worst supported video resolution amongst similar types of digital camera is 320 x 240 pixels.