The video tracking feature will allow you to keep track of who have watched your video and for how long.

You view the number of members that have watch your video by clicking on Content and then Playlist.

Click on the play button of the chosen playlist

The eye icon will state the number of members that have watched the video.

A list will be displayed below the Title and Description that will show all the members that have watched the video and how long they have watched it for.