This is the analysis of your videos.
It's showing the views gained by the videos (different colour for different videos).
You have posted total 267 videos in your life time and 1 video in last 30 days.
@kobayashi When you are on the HOME page of ANOTHER channel... the Channelytics is in comparison to YOU and the Channel you are visiting.
The BLUE line in the graph is YOU and the RED is the channel you are visiting. The graph items are what's being shown in the pull down bar (views last 30 days).. and the comparison between you and them.
The box with the Total Lifetime and information.. You want to read that box LEFT TO RIGHT
TOTAL LIFETIME >> VIEWS (2.11 MILLION) for this channel over it's lifetime >> VIDEOS (267) is the amount for the lifetime of this channel of videos they have up and are public.
LAST 30 DAYS >> VIEWS (n/a) not enough info to post.. >> VIDEOS (1) That means they posted 1 video in the last 30 days.
So it sounds like this user is pretty dormant and inactive lately.
If you are talking about the
-3851 number.... What I would assume, is that "RED" (the comparison channel) probably deleted a video or two around May 13th.. and "BLUE" (your channel) had a really nice bump of traffic around the end of April.
That should help explain this a bit further using your example!