Superstring theory
Concept
A theoretical framework suggesting fundamental particles are vibrating strings.
Mentioned in 2 videos
Videos Mentioning Superstring theory

Cumrun Vafa: String Theory | Lex Fridman Podcast #204
Lex Fridman
A version of string theory that incorporates supersymmetry and requires 10 dimensions, making it capable of describing fermions.

Knowing God’s thoughts: Einstein’s unfinished dream – Public lecture by Dr. Don Lincoln
Fermilab
A theoretical framework suggesting fundamental particles are vibrating strings.