Users can view how many times each section of each video was watched

[crathbun428]

User Story
As a course author, I want to see how many times each section of each video in my course was viewed, so that I can identify segments of video that are either really important or potentially unclear.

Acceptance Criteria
Scenario: A course author can see the number of times each 5 second segment of video was watched for each video in their course
Given I am a course author with X permissions
When I view the course engagement section of the course dashboard
Then I can view the number of times each 5 second segment of video was watched for each video in my course

[SoryRawyer]

I think this can be charted using the fact_watched_video_segments dataset in Superset.