Just a heads up, number 6 from the video about "Happy Birthday" is no longer copyright infringement as it is now (since the start of 2017) in the public domain in US and EU.
Although the larger issue of copyright infringement of actual copyrighted works is still obvioualy againt the law.
That makes me wonder what else might be copywritten (copywrited?) Auld Lang Sine comes to mind but somebody made a trademark on Peanutbutter-and-Jelly sandwiches and Macaroni and Cheese. Kraft foods paid him big bucks for the later trademark!