The Olympus TG-620 supports a maximum video resolution of 1920 x 1080 pixels. That's over two times the video resolution of the most frequently found video resolutions of 1280 x 720 pixels (which is also supported by this camera). In addition, this digital camera support a video resolutions of 320 x 240 pixels and 640 x 480 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 cameras of a comparable age and spec to the TG-620.
Across similar types of camera the worst supported video resolution is 320 x 240 pixels.