curl --request POST \
  --url https://api.gleap.io/v3/youtube-source/preview \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'project: <project>' \
  --data '
{
  "url": "<string>"
}
'

{
  "estimatedCostCents": 123,
  "video": {
    "videoId": "<string>",
    "title": "<string>",
    "durationSeconds": 123,
    "thumbnailUrl": "<string>",
    "channelName": "<string>",
    "privacyStatus": "<string>",
    "alreadyImported": true
  }
}