Video characteristics of included YouTube videos.
| Video Characteristic | Mean (SD) (Range) or n (%) |
| Video duration (min) | 8.1 (12) (0.87–57) |
| Number of views | 21,629 (82,734) (243–582,611) |
| Number of days since upload | 1887 (1147) (121–3950) |
| View ratio | 9.4 (23) (0.086–149) |
| Number of comments | 17 (66) (0–448) |
| Number of likes | 114 (495) (0–3500) |
| Number of dislikes | 6.3 (26) (0–184) |
| Like ratio | 95 (6.9) (67–100) |
| VPI | 8.5 (22) (0.086 to 141) |
| JAMA score | 3.1 (0.27) (3–4) |
| Global Quality Score | 2.6 (1.3) (1–5) |
| Gender | |
| Male | 39 (78) |
| Female | 9 (18) |
| Unknown | 2 (4) |
| Race | |
| Caucasian | 36 (72) |
| Asian | 7 (14) |
| Unknown | 7 (14) |
| Content | |
| Advertisement | 3 (6) |
| Disease-specific information | 22 (44) |
| Nonsurgical management | 4 (8) |
| Patient experience | 12 (24) |
| Surgical technique or approach | 8 (16) |
| Other | 1 (2) |
| Authorship | |
| Academic medical group | 40 (80) |
| Biomedical industry | 1 (2) |
| Private medical group | 4 (8) |
| Other | 5 (10) |
| Tumor type | |
| Astrocytoma | 1 (2) |
| Chordoma | 1 (2) |
| Ependymoma | 2 (4) |
| Hemangioblastoma | 1 (2) |
| Schwannoma | 3 (6) |
| Not specified | 42 (84) |
| Primary or metastatic? | |
| Primary | 11 (22) |
| Metastatic | 4 (8) |
| Not specified | 35 (70) |