A computer system displays a first previously captured media object including one or more first images, wherein the first previously captured media object was recorded and stored with first depth data corresponding to a first physical environment captured in each of the one or more first images. In response to a first user request to add a first virtual object to the first previously captured media object, the computer system displays the first virtual object over at least a portion of a respective image in the first previously captured media object, wherein the first virtual object is displayed with at least a first position or orientation that is determined using the first depth data that corresponds to the respective image in the first previously captured media object.