A video capture card, in layman's terms, is a data collector. In academic terms, it outputs the mixed data of video data or audio data generated by our commonly used video products to the computer
Monitor ports are connection points that allow various data and information flow. Over time, the evolution of monitor ports has resulted in ports that can also power and charge the devices they connect.
There is no comparison between a hdd enclosure and a mobile hard drive, because the hdd enclosure is just a box and does not have storage capabilities by itself.