The next accordion allows the user to change the video thumbnail. There is a three-tier
hierarchy for default video thumbnail images that works the same as the Lesson
Thumbnail image and Lesson Image.
o System Default image – this is set by the sysadmin and is the default
video thumbnail image for all instructors in all institutional accounts,
unless it is changed below
o AA-set default image -In the Site Editor, the AA can upload a video
thumbnail image that will override the system default image for all
instructors in the institution, unless the instructor uploads a custom
image for a lesson.
o Instructor Uploaded image – The author of a lesson can also override the
default image by uploading a custom video thumbnail for the particular
video