Learning video (LearningResource, VideoObject, Clip) structured data in json

<script type="application/ld+json">
    {
      "@context": "https://schema.org",
      "@type": ["VideoObject", "LearningResource"],
      "name": "An introduction to Genetics",
      "description": "Explanation of the basics of Genetics for beginners.",
      "learningResourceType": "Concept Overview",
      "educationalLevel": "High school (US)",
      "contentUrl": "https://www.example.com/video/123/file.mp4",
      "thumbnailUrl": [
        "https://example.com/photos/1x1/photo.jpg",
        "https://example.com/photos/4x3/photo.jpg",
        "https://example.com/photos/16x9/photo.jpg"
      ],
      "uploadDate": "2016-03-31T08:00:00+08:00"
    }
</script>