Abstract: A method and system for manipulating a manifest is disclosed. A server receives a smart appliance a request for a manifest corresponding to a session identifier. The server retrieves from a session server a session manifest based on the session identifier. The server adjusts a session offset based on a difference in a session length represented by the session manifest from a session length represented by a previous session manifest corresponding to the session. When the session manifest comprises an address of an ad break, the server identifies in a cache at least one advertisement to be inserted into the session and replaces at least one address corresponding to at least one segment of the at least one advertisement in the session manifest based on the difference. The server transmits the session manifest to the smart appliance.