code: public Observable<Void> addVideoTranscriptAsync(String teamName, String reviewId, byte[] vTTfile) {
          return addVideoTranscriptWithServiceResponseAsync(teamName, reviewId, vTTfile).map(new Func1<ServiceResponse<Void>, Void>() {
              @Override
              public Void call(ServiceResponse<Void> response) {
                  return response.body();
              }
          });
      }
docs: This API adds a transcript file (text version of all the words spoken in a video) to a video review. The file should be a valid WebVTT format.
  
  @param teamName Your team name.
  @param reviewId Id of the review.
  @param vTTfile Transcript file of the video.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceResponse} object if successful.