How accidents happen on construction sites

https://video.wixstatic.com/video/8dbde2_9e5517a9b7384412a1605fd45ac14881/1080p/mp4/file.mp4

Here's a brief description on causes of accidents on construction sites without going too much in depth but still giving a clear and understandable view on how accidents happen and how to act in order to mitigate these risks.