1. A method for combining video signals in an interactive video system, the method comprising: receiving a first video signal associated with pre-washed video content, the pre-washed video content having been created from prerecorded video content having multiple frames by digitally removing an original character therefrom in selected ones of the multiple frames; receiving metadata associated with the first video signal, the metadata being indicative of the selected frames; receiving a second video signal in real-time comprising second video content having a background image and a video image of a participant playing a role of the original character in front of the background image; filtering the second video signal in real-time to remove the background image to create a modified second video signal with the video image of the participant; and overlaying in real-time the first video signal and, as determined by the metadata, the modified second video signal corresponding to the selected frames to create a combined video signal, whereby the video image of the participant in the selected frames appears in place of the original character of the prerecorded video content.