"main" zone plays all types of contents mentioned as supported by piSignage. Other zones are attached to "main" zone and their content change along with "main" zone. In case of "nested playlist play independently" option, other zones playlist play independently till another "main" playlist is deployed.
Live streaming, video streaming and webpage links play only in "main" zone and do not play in other zones. Video, Audio, weblink, images, pdf, text, media rss, html and web zip files play in other zones as well.