Directtv is too smart for that trick I suspect. Directtv like most video services..ie netflix,amazon etc...have blocked all the well known vpn providers ip blocks. You will get a message that says you can not run the service from a vpn or proxy server. Maybe you can find one they have not blocked.
The method that tends to work more often is to rent a virtual server from a VPS provider and load vpn software and make you own. Still netflix has figure out that trick too and has blocked many of the smaller VPS providers. Obviously they can't block big ones like google,microsoft, amazon etc but those cost more.