The funny part about towing with cars...
If you take a look at the P5, it actually has a frame to mount a hitch to. This means that it was designed to atleast tow something. You still want to worry about weight and its affects on the car.
My dad has a Buick Regal, with a V6. It has enough power for towing, and a bit more weight on the P5. However, if you look at what they have to mount a hitch onto... they have nothing. The hitch bolts to the bumper in two spots, and it bolts to one spot of the floor under the spare tire. Infact, a lot of cars are this way, and they work just fine towing all kinds of stuff.
I feel safer with the setup the P5 has. However, I do know the P5 does have its limitations due to its wieght and powertrain. But as long as it is not a big strain on your car and does not greatly affect handling... then you should be fine.
In my case, I plan on hauling a boat with my P5. I'm trying to keep the weight to 1,500 lbs or less... but I really want one that weighs 1,800 lbs

I have also found dealers providing optional brake packages for trailers, which would take a lot of the work off the car, especially in emergencies. I'd be more worried about stopping than going. I can always control how much I strain my car when I stepping on the gas, but I cannot always control how fast I must stop my car.
Nice video btw. I've seen it before, but it was a shorter version.