Internal processes such as onboarding, offboarding and keeping company culture healthy and not toxic is a challenge every company is facing. The secret is to keep your stakeholders engaged all the time and provide them a clear and solid understanding of the company's values and goals. 
When producing a series of internal explainer videos, you provide your stakeholders a set of tools and references to look up to each time they are drifting from the common goal, that makes them reach understanding easier and feel they are a part of something bigger. A tribe that takes care of you no matter where you are, guiding you back inline when you drift apart.