A cross-cultural comparison of educational video quality on college students’ anxiety and depression: a cross-sectional content analysis of YouTube and Bilibili

Platform architecture, not popularity, drives content quality. YouTube's longer, institution-produced videos set the benchmark, whereas Bilibili trades scientific rigor for real-time chat and high engagement. Both sites remain short of licensed professionals. To prevent digital platforms from amplifying student anxiety, we recommend (a) embedding a quality-weighted algorithmic boost and (b) a sustained "verified expert + student co-creation" pipeline that disseminates evidence-based content at scale.