The host can view their own media stream before changing the state to
ready and allowing participants to enter. The host can specify audio and video devices using the
selectAudioDevice() methods and call
liveEvent.setVideoViewForLiveEvent(videoView, hostId: hostId). When the devices are not specified, the screen is black without any audio. Then, the host can establish a connection with the Sendbird server by calling the
startStreaming() method to see their own view.