The video was a little glossy in describing the final workflow for ensuring that the unit in the "copycat" course gets updated when the "master" course is updated, so here it is in writing:

1)  Publish the unit to the school's LOR with the exact structure you anticipate using in all future updates.

2) Go into the "Copycat" course and import the unit from the LOR as "Dynamically Linked" content.  Use the advanced search options to drill down to the school LOR to find the LOR's copy of the unit.

3) Whenever you are done with updates on the unit, provided you have not changed the structure, you must "Overwrite the LOR object" by re-publishing the unit and choosing "Overwrite existing object" and doing an advanced search in the school's LOR and over-writing the unit in the LOR.

4) Check the "Copycat" course to ensure that the dynamic links now point to the updated content in the LOR.

Note that simply updating the unit in the "Master" course does not update it in the "copycat" course unless you overwrite the unit in the LOR.