Fermat's Last Theorem (without elliptic curves)
It is a brief but concise proof of Fermat's Last Theorem. It leverages induction and contradiction to prove the theorem.
Summer of Math Exposition
Presented by 
3blue1brown
Presented by 3blue1brown
It is a brief but concise proof of Fermat's Last Theorem. It leverages induction and contradiction to prove the theorem.