When adding a Text area property to an entity Additional tools can be enabled for using videos in the field (checkboxes). This feature makes it possible to include a video in e g a knowledge base article or a service item description. If enabled, tools are shown as icons above the field:
•Video upload: Possibility to upload local video to the field.
•Youtube Video Import: Possibility to upload Youtube video to the field.
Read more: Custom Entity forms / Property editor