On an iPhone, how do I play audio while my phone is locked?

A lot of websites list these as the "simple" instructions to follow when you want a youtube video to play audio while your phone is locked:

"1. Open youtube, watch video

2. Lock it while the video is playing

3. On lock screen, double-tap home

4. Click play on controls "

I can follow all these steps, but for some reason, the audio doesn't play. Time moves forward so I know that it's not paused. And the regular video plays sound so I know that there's nothing wrong with its ability to play noise.

If you have iPhone, get one of these two apps, the audio should play in the background even if the phone is locked:

1. Music Video for Youtube - (Free)

2. ITube - ($1.99, extra cost for ad-free edition)

For all these apps, all you have to do is search up the video on Youtube. It should be automatically cached or viewable in history (iTube only). Otherwise, just download the video into your phone and you can watch it while your phone is offline. Have fun. :3

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