分析近万条新冠视频，发现发布时间、标题关键词与视频时长显著影响观众互动。
Content and Engagement Trends in COVID-19 YouTube Videos: Evidence from the Late Pandemic
- 按发布时间分段分析，周中发布视频平均观看量更高，呈现注意力转移趋势。
- 标题含'短片'(shorts)的视频平均播放量达216万，远超其他类型。
- 长篇博客类视频观看量高，但娱乐短片更受欢迎，时长与内容类型决定传播效果。
本研究分析了2023年1月至2024年10月期间发布的约10,000条新冠相关YouTube视频，评估时间、词汇、语言和结构因素对晚疫情时期用户参与度的影响。发布行为显示明显的周内规律：第一阶段周一平均观看量最高（92,658）；第二阶段周三达峰值（115,479）；第三阶段周五最高（84,874），反映观众注意力向中后期偏移。标题词汇分析显示高频词包括COVID、coronavirus、shorts和live。2024年8月，COVID一词出现在799个标题中，出现显著峰值。含'shorts'的视频平均观看量在2023年6月达到216万，表现极佳。英文描述情感分析在原始数据中与观看量相关性弱（Pearson r = 0.0154, p = 0.2987），剔除异常值后，斯皮尔曼相关性r = 0.110（p < 0.001），皮尔逊相关性r = 0.0925（p < 0.001）。不同类别视频时长分析显示：聚焦人物与博客的长视频平均观看量为209,114次，娱乐类短视频平均为288,675次，新闻与政治类中长视频分别平均为51,309和59,226次。结果表明，晚疫情时期新冠相关视频的参与度受发布时间、标题词汇、主题及类型化时长多重因素驱动。
原文摘要 · Abstract (English)
This work investigated about 10,000 COVID-19-related YouTube videos published between January 2023 and October 2024 to evaluate how temporal, lexical, linguistic, and structural factors influenced engagement during the late pandemic period. Publishing activity showed consistent weekday effects: in the first window, average views peaked on Mondays at 92,658; in the second, on Wednesdays at 115,479; and in the third, on Fridays at 84,874, reflecting a shift in audience attention toward mid- and late week. Lexical analysis of video titles revealed recurring high-frequency keywords related to COVID-19 and YouTube features, including COVID, coronavirus, shorts, and live. Frequency analysis revealed sharp spikes, with COVID appearing in 799 video titles in August 2024, while engagement analysis showed that videos titled with shorts attracted very high views, peaking at 2.16 million average views per video in June 2023. Analysis of sentiment of video descriptions in English showed weak correlation with views in the raw data (Pearson r = 0.0154, p = 0.2987), but stronger correlations emerged once outliers were addressed, with Spearman r = 0.110 (p < 0.001) and Pearson r = 0.0925 (p < 0.001). Category-level analysis of video durations revealed contrasting outcomes: long videos focusing on people and blogs averaged 209,114 views, short entertainment videos averaged 288,675 views, and medium-to-long news and politics videos averaged 51,309 and 59,226 views, respectively. These results demonstrate that engagement patterns of COVID-19-related videos on YouTube during the late pandemic followed distinct characteristics driven by publishing schedules, title vocabulary, topics, and genre-specific duration effects.
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