Does it really take less than 12 seconds to generate highlights?

YES. Here are the steps:

1. Select the game you want to watch
2. Tap "Get Highlights" button
3. Select the player you wish to generate highlights for from the list of available players
4. Tap "Done"
5. Tap the Export icon in the upper right corner of the screen and select "Export Highlights"
6. All Done! Highlight Video is saved in your phone's Photo Library