Trick: Audio on YouTube with iPhone locked

We return again with those tricks that so annoy those who think they know everything about this mobile, but that at the same time they come so well to those of us who are obviously discovering things as we use them.

Today's is very interesting if you are interested in YouTube audios but you don't want to listen to the video, such as a song, and it works like this:

1. Open the video in the YouTube app.
2. Hit play.
3. Lock the iPhone.
4. Double click the Home button.
5. Hit Play and the audio will sound through the speakers.

The advantage is that with the screen turned off we spend a pittance on the battery and on top of that we will not have to have the iPhone illuminated if we are using it at night, so double advantage.

Source | AppleWeblog