Loud diesel sound on gas engine

I'm hoping someone can help me out here. I've been reading through all sorts of forums and I'm not sure if this is the same as what everybody is describing. I have the truck listed above Super Crew with a 5.4 liter 3 valve engine. The truck has 68,000 miles on it and it's still under extended warranty from Ford.

So here's the situation. For about the past 10,000 to 15,000 miles or two years. I've had this noise and is getting progressively worse. When the air conditioning is on it is much much worse. It basically sounds like a diesel firing up it's driving me crazy. Along with that I'm getting a smell of oil burning so I cannot run my air conditioning with the fresh air vent, only on recirculate. They have been several instances also where I've had loss of power when I go to push down on the throttle to the point I almost got in an accident before. The engine seems excessively hot but when I hook up the OBD2 reader it is showing the coolant temperature at 196 -205 degrees. I live in Las Vegas.

Here is a video I shot tonight after doing about 35 minutes of driving around my neighborhood. Outside air was 89 degrees that evening.

https://youtu.be/El0qVKXqtKY.

The plugs were changed at 50,000 miles. All fluids, filters, major services were done at 55,000 miles. First 7 years oil changes we're done every 5,000 miles by Ford using full synthetic. After that I did it or had it done every 5,000 still with full synthetic.