The duration of the video is already displayed on top of the thumbnail, so this is redundant.
Google's Video Duration Experiment
This is a strange experiment: Google tests adding the duration of a video to the search result title. I've noticed this experiment by searching for [zero 7 in the waiting line]. Google seems to change the title only for YouTube videos, but not for all of them.
The duration of the video is already displayed on top of the thumbnail, so this is redundant.
The duration of the video is already displayed on top of the thumbnail, so this is redundant.