Table 3. Analysis of all useful videos stratified for video source.
| Charity | Independent user | Health info website | Medical professional | Popular media | University | Medical advertisement | |
|---|---|---|---|---|---|---|---|
| Videos | 15 | 9 | 5 | 5 | 12 | 4 | 1 |
| Percentage of all useful videos | 29.4 | 17.6 | 9.8 | 9.8 | 23.5 | 7.8 | 2.0 |
| Total duration | 01:18:09 | 00:35:21 | 00:25:41 | 00:53:23 | 00:54:03 | 02:25:24 | 00:00:57 |
| Mean duration | 00:05:13 | 00:03:56 | 00:03:13 | 00:10:41 | 00:04:30 | 00:36:21 | 00:00:57 |
| Average days on YouTube | 886.4 | 747.9 | 657.8 | 774 | 1040.2 | 795.3 | 292 |
| Mean likes | 66 | 4.7 | 5 | 9.8 | 11.0 | 5.5 | 0 |
| Mean dislikes | 0 | 0.2 | 0.2 | 0.8 | 0.2 | 0 | 0 |
| Views | 40966 | 10937 | 7943 | 16884 | 27124 | 11594 | 68 |
| Percentage of total viewership | 35.5 | 9.5 | 6.9 | 14.6 | 23.5 | 10.0 | 0.1 |
| Mean views per video per day | 4.6 | 1.5 | 2.4 | 4.1 | 2.4 | 3.2 | 0.2 |
| Symptoms | 6 | 5 | 5 | 4 | 9 | 4 | 1 |
| Epidemiology | 3 | 1 | 0 | 1 | 3 | 1 | 0 |
| Pathology | 1 | 1 | 0 | 5 | 5 | 3 | 0 |
| Aetiology | 5 | 3 | 3 | 3 | 5 | 3 | 0 |
| Diagnosis | 4 | 2 | 0 | 0 | 1 | 2 | 0 |
| Treatment (vitamin A) | 5 | 1 | 0 | 3 | 8 | 3 | 0 |
| Visual aids | 4 | 2 | 3 | 2 | 3 | 0 | 1 |
| Prognosis | 7 | 5 | 5 | 3 | 9 | 3 | 0 |
| Social | 11 | 7 | 3 | 0 | 5 | 2 | 0 |
| Clinical variability | 2 | 1 | 3 | 1 | 4 | 3 | 0 |