I would never do this for other than my own home videos, This morning I made a video of many clips my wife shot when she and her sister went to New England for a week. I burned the video to DVD with a copy each for us and my sister-in-law. This afternoon I was thinking of the topic of subliminal messages and tried an experiment. I took the video of my wife's trip and put in a one-frame picture of a juicy hamburger. And then played the video clip. You can clearly see the hamburger but then I know it is coming. If I reduced its opacity it might not be so obvious. Has anyone experimented with such things? I use Adobe Premiere Elements 8 for video editing.