// options to show header view (which include the back button, title and definition change button) , default .Always,options: .Always, .HorizantalOnly and .None
BMPlayerConf.topBarShowInCase=.none
// loader type, see detail:https://github.com/ninjaprox/NVActivityIndicatorView
BMPlayerConf.loaderType=.ballRotateChase
// enable setting the brightness by touch gesture in the player
BMPlayerConf.enableBrightnessGestures=false
// enable setting the volume by touch gesture in the player
BMPlayerConf.enableVolumeGestures=false
// enable setting the playtime by touch gesture in the player