HyperCard can be used for composing interactive videos by doing the following:
1. Use a high end VCR or VTR (3/4 inch tape) that allows you to accurately control tape position.
2. Record frame number information on a frame control track along with the video signal. If the VCR or VTR does not have this feature, HyperCard can not accurately control what is played from the video recorder.
3. Write your own custom HyperCard XCMD commands to control the VCR or VTR.
For further information on compatible VCR or VTR units, search under: Sony Corporation of America.