according to google "an activity involving physical exertion and skill in which an individual or team competes against another or others for entertainment"
according to Wikipedia "Sport includes all forms of competitive physical activities or games which, through casual or organized participation, at least in part aim to use, maintain or improve physical ability and skills while providing enjoyment to participants, and in some cases, entertainment for spectators.
As stated above, esports are a thing, but I wouldn't consider them as a "sport" I don't think that videogames could improve your physical ability.