relaying, from a first client device to a second client device by a server system, a message generated by the first device, the message having video;

after the relaying, in response to a request from the first client device, archiving, by the server system on a server of the server system, user-selected data including the message;

determining, by the server system, that a current date is an anniversary of the archived data;

causing, by the server system, display of a list of users on the first client device, the list of users including at least a first user associated with the second client device and having a graphical indicium and a second user associated with a third client device and not having the graphical indicium, the graphical indicium indicating an anniversary associated with the message transmitted from the first client device to the second client device;

causing, by the server system, display on the first client device of a notification of the anniversary; and

causing, by the server system, automatic display of the video on the first client device in a thumbnail view without a user command.