Mary, you appear to miss the point of using real-life videos as training aids. You can read about stuff 'till the cows come home, but seeing an actual video of a real event brings home just how these things can happen,
It's why many industries, and safety-conscious organisations such as Network Rail, spend a lot of money paying specialist companies to produce training videos of 'set up' situations.
Even set-up scenarios have far more impact as learning devices than merely reading about incidents. REAL incidents, like this, are even more valuable as lessons to us all as to just how easily these things can bite us. Seeing the video is many more times more valuable as a leaning aid than merely reading an accident report.