Display buffer for ASPlayerVideoNode

[phucdth12a]

In this case we have two color: func videoPlayerNodeScrubberMaximumTrackTint(_ videoPlayer: ASVideoPlayerNode) -> UIColor { return #colorLiteral(red: 1, green: 1, blue: 1, alpha: 0.5) }

func videoPlayerNodeScrubberMinimumTrackTint(_ videoPlayer: ASVideoPlayerNode) -> UIColor { return UIColor.white }

but not have color for buffer of video.

I don't see code show buffer of video.