I did a search for this, and never really found the answer to my original question, will a wired headset allow you to hear video sound through them? I have loads and loads of music videos, and was very unhappy that the Bluetooth Stereo Headset would not play the audio from videos.
I bought an adapter on Ebay to plug in wired headsets, and YES INDEED, IT DOES PLAY THE VIDEO's AUDIO!
I was really very happy to hear that myself, as I enjoy watching my music videos when I am at work and bored. Below I will give the link to who I bought it from. The price for the adapter was only $2.95 with FREE Shipping... you can't beat that, and it works perfectly. The only thing to note about this is that you need a 3.5mm plug (the size used by your computer for headsets) instead of the 2.5mm jack which is used by most phones for those headsets. So, I just use my computer headsets when I want to watch my music videos, however, places like Radio Shack have an adaptor for approximately $3 so you can use a headset with the 2.5mm jack.
Here is the link where I bought mine.... I also received it super fast, much quicker than I ever expected.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=370256103583&ssPageName=STRK:MEWNX:IT