class Player constructor(
        private val context: Context?
){

    fun preparePlayer(videoUri: String, playerView: PlayerView?) {
        val player = ExoPlayerFactory.newSimpleInstance(DefaultRenderersFactory(context),
                DefaultTrackSelector(), DefaultLoadControl())
        player.prepare(buildMediaSource(videoUri))
        playerView?.player = player
        player.playWhenReady = true
    }

    private fun buildMediaSource(videoUri: String): MediaSource =
            ExtractorMediaSource.Factory(DefaultHttpDataSourceFactory("webm app"))
                    .createMediaSource(Uri.parse(videoUri))
}