The Sony ILCE-3000 supports a maximum video resolution of 1920 x 1080 pixels. That's over six times the video resolution of a 640 x 480 pixels digital camera, which is the most common video resolution supported by digital cameras of a comparable spec and age to this camera. 640 x 480 pixels is also supported by this Sony camera. This 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.
A 1920 x 1080 pixels video resolutions is in fact the best supported video resolution amongst all high megapixel cameras that were released more than two years ago.
A 320 x 240 pixels video resolutions is the worst supported video resolution amongst similar types of camera.