The Sony Alpha A7S supports a maximum video resolution of 1920 x 1080 pixels. That's over two times the video resolution of a 1280 x 720 pixels camera, which is the most common video resolution supported by comparable spec digital cameras that have been around for around the same time as this camera. 1280 x 720 pixels is also supported by this Sony camera. This digital camera also supports a video resolutions of 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.
This camera's video resolution (1920 x 1080 pixels) is in fact the best supported video resolution amongst all cameras of this age and type.
Amongst comparable types of camera the worst supported video resolution is 320 x 240 pixels.