The sharpness of the image you can capture depends on the quality of your optics. However it is possible to boost the level of detail within your camera’s settings.
Detail and sharp edges are important to make your image look alive. However excessive detail will reveal ugly edges and give the image an electronic look. Lower detail levels on the other hand will make your image feel flat but also more organic.
Remember that the larger the screen the video is meant to be shown on, the less detail it will be able to support.