Get yourself a 360 degree "bird view" camera system.
(totally random example
They have NTSC outputs, so you can just run an AV cable to the TV and plug it in to an AUX input (if you have a new TV without a yellow AUX VIDEO input, you can get a video to HDMI converter cheaply).
If you don't want to go to the trouble of installing four cameras, you can just put in the front one.
Bonuses of this approach:
1) You can watch all around the vehicle, not just forward.
2) These devices have SD slots and can be set to continuously record, so they serve as a dash cam.
Of course, many dash cams have some kind of video out, so you don't have to get so elaborate. But, running a wire will give you a much less kludgy setup than anything involving an app. If you don't want to even do that, get a wireless backup camera and use it backwards.