Video description: Adding 75 tons of scrap steel to an electric arc furnace. Furnace operates at 90 Megawatts from a 34,500 volt power feed.

And addition info from the video uploader:
This furnace runs around 110MW at peak power.
At 1,100 volts, it will pull anywhere from 60,000 – 80,000 amps.
About the same´╗┐ amount of power consumed by 5,000 average homes.
The noise and fire and explosions are perfectly normal.
It does not smell really bad, smells like money.