Late grades in Knowmia LMS integration

When assigning students to watch Knowmia videos through the LMS as a graded assignment, the assignment deadline is set on the LMS side I believe. Suppose a student watches 75% of the assigned video before the deadline. Then a grade of 75/100 will appear in the LMS. Now let's say the student comes back and watches the rest of the video after the deadline has passed. How will this be reflected in the LMS gradebook? I'm using Canvas, if that matters. Will the student's grade stay at 75? Or will Canvas show a grade of 100 with a Late flag? A grade of 100 without a Late flag? Note that for a regular assignment, Canvas does not close out assignment submission after a deadline (unless the instructor hides the assignment by making it unavailable). Rather, it will accept the student's submission at any time but will flag it as being Late.