just sent them the following email
i have just watched your tree felling videos. i have to say i am appalled at the content, your so called expert cannot have any formal tree training.i have been in this industry for 20 years and your expert is teaching dangerous practices. i hope no-one is seriously hurt or killed by using information from your site,you may find yourself open to litigation. check your countries standards institute,this is what you will need to defend yourself against in court. for professional tree felling information try
www.treeworld.info/
J.Myers