How to get my sound to work when recording an Instagram video?

I have an iPhone 5. Basically I KNOW you need your phone off of silent, and my phone IS, and the volume is on full. When I watch others Instagram videos the sound is fine and works, but when I record my own videos the sound doesn't work? I have my phone off of silent when recording also. I never used to have this problem it used to capture the sound in my videos, it's just suddenly stopped? I've closed the app also (when you double tap the button). Does anyone know what to do?

Added (1). I mean after i've published it, I have no idea if it's actually recording the sound whilst i'm recording. I just tried turning it off and on again, aeroplane mode ect, and still no luck.

Instagram; danniicassar I'll follow back.

You mean it won't work whilst your recording or after you've published it, you can't hear it. Any who this solution should work for both scenarios:

• Turn the iphone off & back on, put it on aeroplane mode and then turn aeroplane mode off and then switch the Wi-Fi back on. That's a full reset and should work.

  • Will my voice sound better or worse on recording? To practise for auditions, I record myself (on my iPhone 4s if that makes a dofference) singing and doing monologues. What I want to know if those recordings make my voice sound better or worse than how it actually is, or if that's how everyone else around me hears my talking/singing.
  • Why is the sound not recording? I have had an iPhone 4 for quite a while now, and I've never had this problem before. When I record videos, the audio doesn't get recorded, and when I play back the video, all I hear is a loud hissing sound. I know that this isn't a problem with iOS 7, because it was perfectly fine when I first updating the OS. I'm really confused.
  • Why Doesn't My Sound Work On Instagram? For some reason my sound isn't working on Instagram on my iPhone 5S. Everything is turned up. But if I click the vibrate switch to vibrate and then sound, it will work. Why is this not working?
  • Why Do I Have To Click The Sound Thing On Instagram To Play The Sound? For some reason the sound hasn't been working on my iPhone for Instagram. Someone said to click on the moving sound bars on the top right of the video and that it will play sound. Well, it worked. But my question is why the hell should I do that? Can't it just automatically play?