Introduction:YouTube is an open-source platform where creators can record and upload videos for others to see. As the popularity of YouTube increases, it is being increasingly used for healthcare-related information. However, with the relative ease of uploading videos, the content quality of individual videos is not regulated. This study aimed to assess and analyze the content quality of YouTube videos concerning meniscus tear rehabilitation. We hypothesized that most videos would be of low quality.Methods: The keywords "meniscus tear treatment," "meniscus tear recovery," "meniscus tear physical therapy," and "meniscus tear rehabilitation" were used for searching videos on YouTube. A total of 50 videos was analyzed in this study that related to meniscal rehabilitation, grouped into one of four categories: nonphysician professionals (physical therapists and chiropractors) (n=28), physicians (with or without academic affiliation) (n=5), non-academic healthcare-related websites (n=10), and non-professional individuals (n=7). Videos were then assessed by two independent authors using three scoring systems, which included the Global Quality Scale (GQS), modified DISCERN, and Journal of the American Medical Association (JAMA) scores. The number of likes, comments, video length, and views were collected for each video. Kruskal-Wallis tests were used to compare quality scores and video analytics.Results: The overall median GQS, modified DISCERN, and JAMA scores were 3 (interquartile range (IQR): 2-3), 2 (IQR: 2-2), and 2 (IQR: 2-2), respectively. Sorted by GQS scores, 20 videos were of low quality (40%), 21 were intermediate (42%), and nine were of high quality (18%). Non-physician professionals produced 56% (28 of 50) of the videos assessed, with physical therapists constituting 86% (24 of 28) of this category. The median duration of each video was 6:54 (IQR: 3:59-10:50) minutes, views was 42,262 (IQR: 12,491), and likes was 877 (IQR: 239-4,850). Kruskal-Wallis testing showed a significant difference between JAMA scores, likes, and video length duration between video categories (p<0.028). Conclusion:The overall median reliability of YouTube videos on meniscus tear rehabilitation measured by JAMA and modified DISCERN scores was low. The overall median video quality, as assessed by GQS scores, was intermediate. Video quality was highly variable, with fewer than 20% meeting high-quality standards. As a result, patients are often viewing lower quality videos when researching their condition online.