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. 2014 Jan 17;28(4):499–500. doi: 10.1038/eye.2013.312

Table 1. Categorisation according to value of content.

Categorisation Useful Misleading No information
Number of videos (%) 51 (31.5) 81 (50) 30 (18.5)
Total duration 06:25:09 07:15:09 01:27:27
Mean duration 00:07:33 00:05:23 00:02:55
Mean likes 6.6 2.0 2.1
Mean dislikes 0.2 0.1 0.1
Total views (000 s) 115.7 137 39.5
Percentage of total views 39.6 46.9 13.5
Average views per video 2224.2 1690.8 1315.7
Average number of days on YT 863.3 672.4 693.6
Average views per video per day 2.5 1.7 1.6