nah. it's just a joke. GHR woks your hamstrings directly, it's not much tougher than that. pull through, high rep SLDL, RDL to a degree, KB swings and freaking leg curls using a machine or bands will accomplish a lot of what the GHR does.
Never used a reverse hyper but it's purported bennies include a light traction on the back while working the erectors and hamstrings. sounds nice axly but not the end of the world if you don't have one.
the vid is directed at the NGA (navel gazers anonymous) members among us. .