If you have already used a webcam to capture a face in Characterizer, then there is a "facecap" file somewhere on your computer. When you open Characterizer all the captured faces are there. Right-click one of them and select Reveal in Explorer. Then you can copy that facecap file to another computer. If you put that file in the right folder on the new computer Characterizer should see it. If you just want to use a pre-recorded video file, you have to play the file on a virtual camera app that Characterizer can see, or on an actual camera. The video recording needs to have the facial expressions that Characterizer looks for, and then you probably have to use the manual option. With the manual option, you could also use a series of still images in place of a video, with your virtual camera.
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