The video below is about a 75 minute demonstration of advanced grading features as you would see them on a Moodle 2.6 site. The video trainer, Eric Brandt, highlights rubrics, checklists, and other advanced grading criteria that can be used in Moodle courses to assess students using Moodle’s standard activities.
At about the 1 hour 19 minute mark it also dives into Moodlerooms’ Joule Grader feature (available only to Moodlerooms/Blackboard clients).
If you’re looking for an indepth look at the Moodle gradebook features, especially those like the rubric this might be a good resource. Direct video link: https://www.youtube.com/watch?v=PH1w6QK1v8o