Disclosed herein is a computer implemented method and system for confirming that a viewer viewed multimedia content on a client device. The client device receives the multimedia content from a server and plays the multimedia content on a display screen of the client device. A random challenge is presented to the viewer by overlaying the random challenge on the multimedia content. The random challenge is one or more of random in content, presented at random times during and/or after play of the multimedia content, and presented at random physical locations on the multimedia content. A response for the presented random challenge is invoked from the viewer. The viewer's response confirms that the multimedia content has been viewed by the viewer. A response report is generated based on the viewer's response. The viewer is credited with an item of value, if the response report confirms the multimedia content was viewed by the viewer.