meta/modality.json

{
  "state": {
    "observation.state": {
      "start": 0,
      "end": 53,
      "original_key": "observation.state"
    }
  },
  "action": {
    "action": {
      "start": 0,
      "end": 53,
      "original_key": "action"
    }
  },
  "video": {
    "cam_left_high": {}
  }
}