No action takes place during the first nearly 5 minutes of the video, but you'll understand why after watching it in its entirety.
The test crash takes place at 4:54.
Then there are a series of slow-motion views from a variety of angles:
Critical Tests to Begin on Highway Guardrail Banned in Most States. (The New York Times, 12/9/2013)
It's still 2005 at the Federal Highway Administration
Yet the new crash tests, selected and planned by Trinity, will essentially replicate the standard, new-to-market tests done nearly a decade ago when the modified ET-Plus system was released. Federal officials have not required the company to follow testing guidelines that were updated in 2011, or to modify the tests to better replicate the accidents that result in injuries.