Changes to Create a new video

api operation id scenes.generate removed and replaced with generateNarrationVideo

added the non-success response with the status 409

added the non-success response with the status 404

added the non-success response with the status 400

added the non-success response with the status 503

removed the request property source/extractor

removed the request property source/truncated

added the new optional request property backgroundVideoId

added the new optional request property thumbnail

added the new background enum value to the request property mediaType

added the new optional request property afterImageUrl

added the new optional request property beforeImageUrl

added the new optional request property source

the request property script became optional

added the new source enum value to the request property inputType

the script request property's minLength was decreased from 1 to 0

the oneOf[subschema #1]/data response's property type changed from no type to object for status 403

the response property oneOf[subschema #1]/data became required for the status 403

added the required property oneOf[subschema #1]/data/feature to the response with the 403 status