The options for streaming of Live Video are VGA (low resolution), 720p and 1080p. The default for most cameras is 720p.
1080p requires at least about 1Mbps available upload bandwidth from your service provider. If you Live video is choppy then you may want to change to VGA resolution to get a better Live video stream.
Go into Advanced Settings, Video Setting, Video Streaming Quality and make your selection.
Regardless of your choice for the Live stream, all recordings will always be in 1080p.