Abstract: The disclosure provides a method (300) for inserting an advertisement into a video stream of an AoD service. The method is performed by an AoD processing device and includes steps of: acquiring (S310), from the AoD server, advertisement configuration information; determining (S320) an advertisement to be inserted based on the advertisement configuration information; receiving (S330), from the AoD server, a notification that a triggering condition for inserting an advertisement is satisfied, the triggering condition being associated with an interaction between the AoD server and a client device to which the AoD service is provided; transmitting (S340) to the AoD server an instruction to cause the AoD server to render a combined picture of the application and the advertisement based on the advertisement configuration information; and receiving (S350), from the AoD server, the combined picture and converting it into a frame in the video stream for transmission to the client device.