Hydra representer

[tpluscode]

To represent the videos as we'll need a number of transformations to the raw data:

• @context (Create JSON-LD context documents #8)
• add @type array to root and nested resources
  • https://schema.org/VideoObject
• turn uri properties to @id
• wrap dimensions in http://schema.org/QuantitativeValue objects
• wrap embed in some api-specific structure
• convert durations to https://schema.org/Duration
• make licenses URLs pointing to CC
  • https://creativecommons.org/licenses/by-nc/2.0/ etc