Datasources refer to the specific data sets or feeds used for livetagging and gathering statistics during sports events. In vMix software, datasources provide the necessary information to populate titles and overlays with live data. Each sport typically has its own dedicated datasource that is designed to capture and process relevant statistics. These datasources can be obtained from platforms like TeamTV, which provides documentation on extracting datasources. Datasources play a crucial role in enhancing the visual presentation of statistics during livestreams and broadcasts.