I have an Android so I don't know iPhone at all, but probably you have to have an app for whatever you want to do.  If you have a YouTube app, then you could upload your video to YouTube.  Be sure you turn on WiFi first.  Also the Photobucket app will upload all your videos and photos automatically to Photobucket.  You have to get these things from the app store.  There is probably an icon on your phone for it. 

I have an app on my android that is called WiFi Transfer.  It is really good to move pictures and movies from the phone to the computer and also to move files from the computer to the phone.  Most of these apps have a version for both iPhone and Android, so search your app store and see what you find.  Also, I think you can plug the usb end of your charging cord into your computer and use your Windows file system to look at the files on the phone and move them to the computer.