This is pretty awesome:

Publishers have the option of attaching a heat map of sorts to their videos. The map shows up below videos as a variously colored bar, which ranges from blue to red and activates when the user types in a particular topic. For example, if you’re watching a clip about a golf tournament, you can enter “Tiger Woods” and the bar will show you where the commentator spends time discussing and showing footage of that famous golf player. The topics are automatically detected by a combination of speech and contextual analysis, so publishers don’t have to break down their videos manually.

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