When we sinced the new HTC One S at the store. It did not transfer my videos over. Old phone has the videos ...... New phone needs to have the videos. I've tranfered the videos to my computer but with NO audio. So I put them back into my old phone.
If you are able to move the videos to a computer, you have the option to move them from the computer to the device. When I moved to the One S, I downloaded an app called Dropbox on my old Android phone, and synced my media to my new phone (that app is already pre-installed on the One S).