private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.vertexai.api.VideoMetadata,
            com.google.cloud.vertexai.api.VideoMetadata.Builder,
            com.google.cloud.vertexai.api.VideoMetadataOrBuilder>
        getVideoMetadataFieldBuilder() {
      if (videoMetadataBuilder_ == null) {
        if (!(metadataCase_ == 4)) {
          metadata_ = com.google.cloud.vertexai.api.VideoMetadata.getDefaultInstance();
        }
        videoMetadataBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.vertexai.api.VideoMetadata,
                com.google.cloud.vertexai.api.VideoMetadata.Builder,
                com.google.cloud.vertexai.api.VideoMetadataOrBuilder>(
                (com.google.cloud.vertexai.api.VideoMetadata) metadata_,
                getParentForChildren(),
                isClean());
        metadata_ = null;
      }
      metadataCase_ = 4;
      onChanged();
      return videoMetadataBuilder_;
    }
<pre>
Optional. Video metadata. The metadata should only be specified while the
video data is presented in inline_data or file_data.
</pre>

<code>
.google.cloud.vertexai.v1.VideoMetadata video_metadata = 4 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/Part.java