Size does matter here! As long videos fit the emotional approach. Even if drop-off happens due to videos being too long, it’s not enough to put aside this Format.
Has a Huffington post discovered that 2/3 viewers stopped watching a 30-second video just after 10 seconds?
Whereas in a 2min30 long video they stopped watching after 39 seconds, even if the percentage of the video seen by the viewer is better for the short video, the long video format is still a better choice for your emotional content as you can’t tell much of a story in 10 seconds which you will need to do if you want to emotionally reach your viewer’s.