Why the Sith Break the Rule of 2 – Star Wars Explained

Why do the Sith constantly break the Rule of 2 while at the same time seemingly living and dying by it. Why are dark siders like Asajj Ventriss and Savage Opress brought into the fold of the Sith if there are only supposed to be 2, also what is the explanation later for Starkiller under Vader. In this video we explain it all and explore why the Sith believe they are actually still adhering to the Rule of 2.