GuestMeeting Replaced -  renderTarget = try! videoService?.preview(videoView) with   renderTarget = try! videoService?.showPreviewOnView(videoView). for name changes in SDK
GuestMeeting Replaced -  renderTarget = try! videoService?.preview(videoView) with   renderTarget = try! videoService?.showPreviewOnView(videoView).
for name changes in SDK

bryzinski/skype-ios-app-sdk-samples