IPhone 4S video sound problem?

Hi, I have an iPhone 4S and over the past few days whenever I watch a video online the sound plays through the earpiece and not the speakers.
All other sound works absolutely fine, music, ring tone and all that jazz plays through the speaker.
I've tried putting my music and ringer and video all to full volume and in silent mode and not and it doesn't change anything, the volume of the earpiece responds to the volume being changed too.

I can fix this for you. Its a hard ware issue within the phone. Email me if you need help. I work at apple in Texas.

Hold home and lock button simultamiously until it turns off, it resets, no risks either

Same here.
tried reseting it; didn't work.
And I'm sure it's not a hardware problem either.