The realtime view provides you with detailed information regarding all of your videos that are being watched now. Here you can see the total number of videos being watched right now, the number of users watching them, and how far each user has progressed.
#1 The total number of users watching videos, the number of videos being watched, and the number of sub-domains they're being watched form.
#2 The sub-domains from which people are watching your videos on
#3 The video title, thumbnail, and the number of users currently watching it
#4 User progress. The graph is split into deciles (10% of the video, 50%, etc) and shows the number of users currently watching the specific part of the video