Can I push web multimedia content from Android or iPhone to QCast? What kinds of apps can support this pushing function?
The pushing actions usually depend on your apps or applications which have the DLNA/UPnP function ability. For example, Bubble UPnP can do that without requiring semperVidLinks.  https://play.google.com/store/apps/details?id=com.bubblesoft.android.bubbleupnp