%0 Journal Article %@ 1929-073X %I JMIR Publications %V 10 %N 3 %P e27302 %T Exploratory Analysis of Electronic Cigarette–Related Videos on YouTube: Observational Study %A Xie,Zidian %A Wang,Xueting %A Gu,Yu %A Li,Dongmei %+ Department of Clinical & Translational Research, University of Rochester Medical Center, 265 Crittenden Boulevard Cu 420708, Rochester, NY, 14642, United States, 1 5852767285, dongmei_li@urmc.rochester.edu %K infodemiology %K infoveillance %K social listening %K electronic cigarettes %K e-cigarette %K YouTube %K user engagement %K provaping %K vaping-warning %D 2021 %7 6.7.2021 %9 Original Paper %J Interact J Med Res %G English %X Background: Electronic cigarette (e-cigarette) use has become more popular than cigarette smoking, especially among youth. Social media platforms, including YouTube, are a popular means of sharing information about e-cigarette use (vaping). Objective: This study aimed to characterize the content and user engagement of e-cigarette–related YouTube videos. Methods: The top 400 YouTube search videos related to e-cigarettes were collected in January 2020. Among them, 340 valid videos were classified into provaping, vaping-warning, and neutral categories by hand coding. Additionally, the content of e-cigarette videos and their user engagement (including average views and likes) were analyzed and compared. Results: While provaping videos were dominant among e-cigarette–related YouTube videos from 2007 to 2017, vaping-warning videos started to emerge in 2013 and became dominant between 2018 and 2019. Compared to vaping-warning videos, provaping videos had higher average daily views (1077 vs 822) but lower average daily likes (12 vs 15). Among 161 provaping videos, videos on user demonstration (n=100, 62.11%) were dominant, and videos on comparison with smoking had the highest user engagement (2522 average daily views and 28 average daily likes). Conversely, among 141 vaping-warning videos, videos on potential health risks were the most popular topic (n=57, 40.42%) with the highest user engagement (1609 average daily views and 33 average daily likes). Conclusions: YouTube was dominated by provaping videos, with the majority of videos on user demonstrations before 2018. The vaping-warning videos became dominant between 2018 and 2019, with videos on potential health risks being the most popular topic. This study provides updated surveillance on e-cigarette–related YouTube videos and some important guidance on associated social media regulations. %M 34255663 %R 10.2196/27302 %U https://www.i-jmr.org/2021/3/e27302 %U https://doi.org/10.2196/27302 %U http://www.ncbi.nlm.nih.gov/pubmed/34255663