Thanks for the link. The expert in the video says that he believes fracking is safe, yet the facts he cites support the opposite conclusion.
According to the video, unlike ordinary natural gas drilling, fracking involves pumping toxic chemicals (including benzene and formaldehyde) under pressure into the ground. But like ordinary drilling, failures can and do occur. The video cites faulty drilling casings and operator incompetence as the causes of two incidents where water was contaminated with natural gas, and a third incident where water was contaminated by trucks bringing benzene to the drilling site. That the first two failures weren't unique to fracking and that the third was not directly related to the drilling itself are not rational reasons for discounting them in assessing the overall risks of fracking.
Even if the expert is correct in saying that the risk of failure is the same as ordinary drilling, it is the consequence of failure that must be considered. If the risk for a plumbing failure at a nuclear power plant were the same as the risk of a leak in my garden hose, no reasonable person would conclude that the plant was therefore no riskier than watering my lawn. Yet that is essentially the logic applied by the video's 'expert'.