According to Comscore, the average length
of online video is 4.4 minutes (as recently as
January), but YouTube is the one platform
where longer videos actually outperform
YouTube has a selfish interest in promoting
videos that increase a user’s time on the
website. The truth is, longer videos that hold
attention accomplish this best. For that
reason, watch time is a ranking signal for
appearing higher in YouTube search results.
(We’ll discuss keyword optimization later.)
Watch time is measured in cumulative
minutes watched, and each video uploaded
(along with every YouTube channel) is ranked
by the watch time metric. Channel and
videos with higher watch times are likely to
show up higher in search results and
YouTube accounts initially limits video length
to 15 minutes, until accounts are verified.
Once verified, YouTube accounts can post
video that does not exceed 20GB in size.
Length is Important