Create 3x 5 minute Fundamentals videos

[Relequestual]

Linked to #85

Cover

• What’s a Schema?
• Applicability
• Applicators
• Assertions
• Annotations

[kinlane]

Do we have a specific Youtube channel setup?

[Relequestual]

yes, but I'm not sure if I've done it right or not, and we probably need some graphics for it.