There isn't much context to this video. Two storm chasers, Brandon Ivey and Sean Casey, got hit by a tornado in their armored Tornado Intercept Vehicle 2, which is designed to be hit by tornadoes.

Simply, this is what it looks and sounds like inside a twister. For me, there's also something about the alien movement of the rain on the windshield that's almost scarier than the effects of the swirling wind.