Here’s the video:
As you’ll see in the embed, the iPhone 6 is dipped while recording a video with the screen on, and a few seconds later, it shows the the temperature warning. By the end, the whole solution solidifies, and smoke starts coming from the iPhone, possibly from the battery.
After the iPhone 6 cooled down, the user scraped off the solid coke, showing the damaged device. Its screen had popped out, and many of its buttons were stuck, and unsurprisingly the iPhone didn’t work.