A method comprising: receiving, via a distribution channel, video data having an identifier that identifies a position within a video and an address defining a location of a stored playlist. Various other apparatuses, systems, methods, etc. If the C2C call is directed to an automated system and placed in a queue or on hold, the present invention allows supplemental content intended for the user to be delivered to the web client from which the C2C call was initiated. A value of the old flag is set according to a previous movement. Methods for treating a patient using the selected treatment composition are also provided, together with methods for monitoring the efficacy of the treatment composition during a treatment period.