         return 0.0
     }
     
-    fileprivate func updateCurrentTimeLabelWithTime(time: TimeInterval) {
+    private func updateCurrentTimeLabelWithTime(time: TimeInterval) {
         self.currentTimeLabel.text = timecodeForTimeInterval(time: time)
     }
     
-    fileprivate func updateDurationLabelWithTime(time: TimeInterval) {
+    private func updateDurationLabelWithTime(time: TimeInterval) {
         self.durationLabel.text = "/\(timecodeForTimeInterval(time: time))"
     }
     
-    fileprivate func updateRemainingTimeLabelWithTime(time: TimeInterval) {
+    private func updateRemainingTimeLabelWithTime(time: TimeInterval) {
         self.remainingTimeLabel.text = timecodeForTimeInterval(time: time)
     }
     
-    fileprivate func timecodeForTimeInterval(time: TimeInterval) -> String {
+    private func timecodeForTimeInterval(time: TimeInterval) -> String {
         let sign = time < 0 ? "-" : ""
         var timeCode = ""
         let absTime = Int(abs(time))

        self.addPlayerDidEndPlayingVideoObserver()
    }
    
    fileprivate func addPlayerItemPlayDurationObserver() {
        guard let duration = self.player.currentItem?.duration else {
            print("duration is nil")
            return

        updateRemainingTimeLabelWithTime(time: duratoinInSeconds - secondsElapsed)
    }
    
    private func updatePlayer(playIfNeeded: Bool) {
        guard let currentItem = self.player.currentItem else {
            print("players current item is nil")
            return
