The openness and influence of video-sharing platforms (VSPs) such as YouTube and TikTok attracted creators to share videos on various social issues. Although social issue videos (SIVs) affect public opinions and breed misinformation, how VSP users obtain information and interact with SIVs is under-explored. This work surveyed 659 YouTube and 127 TikTok users to understand the motives for consuming SIVs on VSPs. We found that VSP users are primarily motivated by the information and entertainment gratifications to use the platform. VSP users use SIVs for information-seeking purposes and find YouTube and TikTok convenient to interact with SIVs. VSP users moderately watch SIVs for entertainment and inactively engage in social interactions. SIV consumption is associated with information and socialization gratifications of the platform. VSP users appreciate the diversity of information and opinions but would also do their own research and are concerned about the misinformation and echo chamber problems.

翻译：视频分享平台（VSPs）如YouTube和TikTok的开放性与影响力，吸引了创作者发布各类社会议题视频。尽管社会议题视频（SIVs）会影响公众舆论并滋生虚假信息，但平台用户如何获取信息及与SIVs进行互动的问题尚待深入探究。本研究对659名YouTube用户和127名TikTok用户开展问卷调查，旨在理解用户在VSPs上消费SIVs的动机。研究发现，平台使用的主要驱动力来自信息获取与娱乐满足需求。用户出于信息检索目的使用SIVs，并认为YouTube和TikTok便于与之互动；用户适度观看SIVs以获取娱乐体验，但在社交互动方面参与度较低。SIV消费与平台的信息获取及社交满足功能显著相关。用户虽认可平台信息与观点的多样性，但仍会进行独立核查，并对虚假信息及信息茧房效应表示关切。