This video explains the Lanthanides Electronic Configuration.

This video explains the Lanthanides contraction and the trends of ionic radii and also explains the Lanthanides Contraction consequences:

#ionic radii

#electronegativity

#electrode potential values

#basicity differences

#hydrolysis of ions

#stability of the salts

#thermal decomposition of oxy salts

#formation of complexes

#the resemblance of the 2nd and 3rd transition series 

This video explains the complex formation by lanthanide with

#unidentate ligands

#chelating ligands

and also with sigma donor ligands.

This video explains the 

0:15 Methods for Separation of lanthanides into individual components

3:35  Fractional crystallization. 

This video explains the methods for separation into individual components by Gradation of decomposibility for lanthanides nitrates and Valency Change methods.