Why Do Sporadic Groups Exist?
Sporadic groups
How We Got to the Classification of Finite Groups | Group Theory
Group theory, abstraction, and the 196,883-dimensional monster
Monster Group (John Conway) - Numberphile
Sporadic Groups - Prof Richard Borcherds - The Archimedeans
Math talk: Sporadic groups and number theory
Robert Griess | My life and times with the sporadic simple groups
How to Construct Every Symmetry | Decomposition, Extension, and Classification of Groups
Simple Groups - Abstract Algebra
What are...sporadic groups?
Sporadic Groups
Mystery of the 26 Sporadic Groups in Mathematics and Physics
The Monster Group - John Conway
Classification of Finite Simple Groups
Коллоквиум. Wondering About Sporadic Simple Groups | Robert Griess | Лекториум
What is a simple group?
Classification Theorem for Finite Simple Groups Music Video
Monster Group (a little extra bit)
PMSP - Quasi-random groups - Timothy Gowers