Sound Won't Play For Instagram Videos?

My iPhone is not turned on silent and the setting for the microphone is turned on.

When I play a video from Instagram the only way that seems to be working but is really, really annoying is by clicking on the video (not hearing any sound from the video) then switching my unsilent phone to silent then switching it back to unsilent that is the only way it plays any sort of sound.
This is only for Instagram not any other apps I have and it's a nuisance to deal with. There aren't any articles that seem to help. I even tried to delete the app and re-install it but that didn't fix anything.

Don't know if it means anything but I have the iPhone 4S.

So please… Help!

I had the same thing happen to me! When you click play on a video, there should be an icon in the top right corner of the video. Click it, and you should be able to hear.

Hope this helps!

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