Here's a good example of a quick, effective message where the visuals support the audio, which is where the real message is. Sometimes, that's all you have. No direct interaction; just audio and visuals. You're doing an elevator pitch. You've got under 2 minutes. If you can get the visiting brain to retain the content, you win mindshare.
What I like about this is that the visual component really supports retention of the message--and it's SIMPLE. PowerPoint + a few graphics + audio piped through any of a dozen tools can produce this.