Blinking CEL, no power, white smoke...

Was driving home tonight--got on highway and in less than 5 minutes of driving, my car suddenly lost power, the CEL started blinking, and the engine was making a constant shuddering/hesitation noise/feeling. It had no power to rev and I basically kept it at 4k RPM to maintain speed of around 55 mph to try to limp home (I was about 8 miles away). I did not notice any smoke from the back of my car while driving. Halfway, I started noticing a smell--maybe burning rubber or plastic? Decided I should prevent further damage and then pulled off to a parking lot. Upon parking, I noticed white smoke from under hood and coming into the cabin from under the car. Strong smell of burning plastic/rubber (it did not smell like coolant or oil).

I can start the car, but it won't idle and will die unless I give it gas. This is a link to what the engine sounds like as I hold the throttle to keep it around 2k RPM to keep it alive:

You Tube

You Tube

I've done some searching and it seems like I should check the plugs, coils, and cat? What should I be looking for? And how can I tell if the cat is bad without taking it off?

Thanks,
FS

Blinking CEL, no power, white smoke...