Explainer videos could either be short marketing videos that highlight the services and solutions of a company.
When used for a product, they provide details around the features and their unique selling point.
Explainer videos are generally used when developing pre-release material for an Induction training. When used for a product they are used for marketing and brand communication.
Explainer videos can also be used to illustrate a concept better. For this purpose, they are then titled as Conceptual videos. They can be deployed standalone or embedded within a training module.