How does YouTube prevent the screensaver from showing up during video playback? (Windows)

Question

I have noticed that mi screensaver doesn\'t start while I\'m watching videos on YouTube. I\'m using Windows 7.

This is the test:

1. Set Windows screensave

Answer 1

I found some documentation at help.adobe.com - Playing video in full-screen mode:

Flash Player and AIR allow you to create a full-screen application for your video playback, and support scaling video to full screen.

For AIR content running in full-screen mode, the system screen saver and power-saving options are disabled during play until either the video input stops or the user exits full-screen mode.