So in the video, olive and avocado oil also get promoted as the healthy alternatives while somebody says that omega 6 detox takes years. That sounds inconsistent to me. If even a supposedly healthy diet contains substantial amounts of omega 6, how could it be that bad or take that  long to undo taking more before? 

 They're "healthier" but butter/tallow are still 3x lower omega6 than those. "You are what you eat" coming into play here. Takes a while to cycle out the bad fats that have been accumulated.