Here are some key terms for this topic: Key Terms C2
These are quite good but you do not need to know about Centrifugation or Sublimation:
Online Separation Techniques from Hwa Chong Institution
IGCSE Chemistry: Topic 2 Experimental Techniques, a 7m lesson by Sal Sciab.
GCSE s-cool – atomic structure includes Separating Mixtures – excellent revision notes & animations.