Upload video via API to VOD storage

export GCORE_API_KEY="{YOUR_API_KEY}"

curl -L 'https://api.gcore.com/streaming/videos' \
-H 'Content-Type: application/json' \
-H 'Authorization: APIKey $GCORE_API_KEY' \
-d '{
  "video": {
    "name": "Gcore Demo",
    "description": "Video copied from an external S3 Storage",
    "origin_url": "https://demo-files.gvideo.io/gcore.mp4"
  }
}'

{
  "id": 2496039,
  "name": "Gcore Demo",
  "description": "Video copied from an external S3 Storage",
  ...
}

curl -L 'https://api.gcore.com/streaming/videos' \
-H 'Content-Type: application/json' \
-H 'Authorization: APIKey $GCORE_API_KEY' \
-d '{
  "video": {
    "name": "Gcore Demo",
    "description": "Uploaded via TUS session"
  }
}'

{
  "id": 2501637,
  "client_id": 1000503,
  "name": "Gcore Demo",
  "description": "Uploaded via TUS session",
  "duration": null,
  "slug": "70NbFUCZyXU2s3tY",
  "status": "empty",
  ...
}

curl -L 'https://api.gcore.com/streaming/videos/2501637/upload' \
-H 'Authorization: APIKey $GCORE_API_KEY'

{
  "servers": [
    {
      "id": 561,
      "role": "upload",
      "hostname": "vod-uploader-ed-2.gvideo.co",
      "active": true,
      "ssl": true
    },
    ...
  ],
  "token": "eyJhbGciOiJIUzI3O6kc3Og...",
  "video": {
    "id": 2501637,
    ...
  }
}

DEBUG=1 tusc -H "https://vod-uploader-ed-2.gvideo.co" -f "file_to_upload.mp4" -b "/upload/" -- -H "'Upload-Metadata: client_id $(echo <client_id> | base64 -w0),filename $(echo <filename> | base64 -w0),token $(echo <token> | base64 -w0),video_id $(echo <video_id> | base64 -w0)'"

const options = {
  endpoint,
  chunkSize,
  retryDelays: [0, 1000, 3000],
  metadata: {
    filename: file.name,
    filetype: file.type,
    // required TUS metadata fields
    token: token,
    video_id: videoid,  // variable name used in CodePen
    client_id: clientid // variable name used in CodePen
  },
  onError(error) {
    ...
  },
  onProgress(bytesUploaded, bytesTotal) {
    ...
  },
  onShouldRetry(err, retryAttempt, options) {
    // HTTP 500 can be transient or a configuration error (token/ID mismatch).
    // Inspect err.originalResponse body to distinguish them before retrying.
    return retryAttempt < 3;
  },
  onSuccess() {
    ...
  }
}

upload = new tus.Upload(file, options)
upload.findPreviousUploads().then((previousUploads) => {
  askToResumeUpload(previousUploads, upload)
  upload.start()
  uploadIsRunning = true
})