For students and science enthusiasts interested to have a general introduction to crystallography, here are some very nice Youtube videos, truly enjoyable!
A Century of Crystallography: the Braggs Legacy YouTube video
Seeing Things in a Different Light: How X-ray crystallography revealed the structure of everything -A lecture by Prof. Stephen Curry YouTube video
An interesting example of structure-property relation in crystals- how kitchen lighter guns work :) YouTube video
A documentary on Prof. G. N. Ramachandran and his invaluable contributions to the field of crystallography YouTube video