That was entertaining. My real world example: Bought '14 accord sport MT for the wife, $22,000 (not including taxes, ect) at 0.90 percent. Paid it off in 2 years, spent about 200 in interest. Honda offered $500 to finance through them. So i gained money financing it, and the car would probably still sell for 19k private party. Two years and 23k miles later it has lost about 15% since people pay crazy money for used hondas. The video says i would have lost 25% that night! 70% value lost at 4 years? Yeah right. 2011 Accords are still about 13k or over 50% of new. A 2012 model year jumps to about 65% value. 2016 models are about to come out so you have to decide if a 4 year comp is fair to say 2011 or 2012.
We bought a new car to drive it for its entire lifespan. Why pay 6k for a car that has most of its lifespan consumed? In the Honda Accord space $6k gets you some old beater with 150k+ miles on it already and no modern tech.
The cars i drive are all old and worth about 3-5k each because i like old cars, german cars, stuff like that. My 540 sport wagon cost me $3250.00 yet stickered for 50-60k in 2000. Would i buy a new BMW? no way.
Normal people just Buy, Consume, Repeat. Buying new is smart if you have the money and will really use the vehicle for at least 10 years.