Hi Travis, if it's a dv video it will be more difficult to repair as it's a digital video format and the time code is embedded on the tape and any break in time code (i.e. break in tape) will be difficult for a player to read. It can be done but he may lose a few seconds of video around the break point. If it's something like a VHS tape it's a little easier to deal with.
My suggestion would be to find a video production company/house in his local area and ask them to repair it. It won't be cheap but if he needs it I don't know of any way or kit for him to do it himself.
Gary, I appreciate your help.
I can see this being very expensive and a pain with digital formats.