How not to drive in bad weather

Wet roads mean slippery conditions. But for these 2 drivers, it does not matter. First vehicle in dashcam video shows severe tailgating. What would happen if the car in front hit the breaks?

The 2nd driver is not only driving too fast for road conditions, he quickly and dangerously changes lanes after passing on right hand side. He quickly goes nowhere fast as apparent buy the vehicle that he ends up behind.