Just buy a BMW X7 M60i or X5 M60i (both have the actual real M S-68 engines). This Range Rover has the actual BMW engine (none M version), transmission, and gears. You save lots of money and headaches not dealing with electrical issues.
A car that cost probably... I dont know half a million maybe ?!!?! ... and you have no few bucks to hire someone that really can make a good video of it?! SHAME!