No video signals or video interference.
Install video in-line filter on the power wire and the ground wire on both the monitor and the camera. 
IMPORTANT:
The power cord directly out of the camera includes Black Wire (Ground), Red Wire (Power), and hidden Blue Wire (Antenna).  Splice the power cord and extend the Blue Antenna wire for maximum signal strength.  If noise or video static persist, remove noise filter on the camera end.

Does the VTC460R mirror monitor fit on my factory mirror?
If the factory mirror is a stand alone rear view mirror without home-link or On Star, it will fit.

Does the VTC460R have an extra input for auxiliary camera or video?
Yes it has one extra video input.