How to calculate a field

[IRediTOTO]

I have a video collection like this
How can I calculate the video field ?
Now the Api returned only video: "642051a9fa2546c499f623c7"

export const video: RelationshipField = {
  name: "video",
  relationTo: COLLECTION.MEDIA,
  type: "relationship",
  hasMany: false,
  maxDepth: 1,
};

export const videoBlock: Block = {
  slug: "videoBlock",
  fields: [video],
};

[IRediTOTO]

I am wrong, should set like this
export const video: RelationshipField = {
name: "video",
relationTo: COLLECTION.MEDIA,
type: "relationship",
access: { read: () => true },
hasMany: false,
maxDepth: 1,
};