Pro athlete walking in slow motion with headphones on! Black and white shot of a rock star playing in front of an audience that's clearly over the fire code capacity! Did I mention HEADPHONES?
Want to sell medical technology? Show actors in lab coats with beakers.
Want to sell beer? Show some weathered old cowboy sitting by a river in the Rockies.
Want to create the illusion that you're selling something people need, when in reality, it's just some garbage they're peddling for money? Use stock footage like this video.