In the course of combating novel coronavirus pneumonia (COVID-19), high-quality short videos on wearing masks could help promote public understanding and minding their way of wearing masks correctly and reasonably. Based on the content analysis on such short videos released on typical science communication platforms, the social effects and characteristics of communication context of three types of videos are studied, and the circumstances or the reasons for which cognitive mistakes that occur in communication are discussed. Finally the enlightenment for both science popularization creations and media communications are elaborated from four aspects: the contents of creation and communication must be highly consistent with the context; the scientific review and correction mechanism should be gradually established in social media platform; the science communication database should be built and developed from fragmental knowledge to systematic knowledge collection; and the cultivation of rational scientific thinking should be taken as an important goal of science popularization.