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Calabasas Online Tutoring, "Infinitesimal Definition."

Charles Coe, "6Rockets (Derivation of the Tsiolkovsky Equation using infinitesimals)."

Claremont McKenna College, "Marx, Mao, and Mathematics: The Politics of Infinitesimals - Joseph Dauben ’66."

Curolearn, "LEARN CALCULUS IN AN EASY WAY | PART 1 | Curolearn."

GreshamCollege, "Ghosts of Departed Quantities: Calculus and its Limits - Professor Raymond Flood."

Sabine Hossenfelder, "Is Infinity Real?."

itsallaboutmath, "John Conway: Surreal Numbers - How playing games led to more numbers than anybody ever thought of."

JilliZhiLing, "Surreal numbers."

Gary K., "Khan Academy Surreal Numbers."

kupala, "Evaluating Definite Integrals using Infinitesimals (no limits)."

kupala, "Finding Derivatives using Infinitesimals (no limits)."

Fabrice Laussy, "Infinitesimals."

Gottfried Leibniz, "The Birth Of Calculus (1986)."

MathAdam, "Product Rule With Infinitesimals."

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John Mount, "Numbers."

Kannan Nambiar, "Infinitesimals and Cardinals."

Nikolaj-K, "Infinitesimals in Synthetic Differential Geometry."

njwildberger, "FamousMathProbs19c: Stevin numbers, infinitesimals and complex numbers."

njwildberger, "Infinity: does it exist?? A debate with James Franklin and N J Wildberger."

njwildberger, "MathHistory25: Problems with the Calculus."

Numberphile, "The Infinitesimal Monad - Numberphile."

Numberphile, "Infinitesimal Monad (extra footage)."

Numberphile, "The Opposite of Infinity - Numberphile."

Numberphile, "Surreal Numbers (writing the first book) - Numberphile."

Derek Owens, "Calculus 5.2c - Infinitesimals - Archimedes."

Derek Owens, "Calculus 5.2d - Infinitesimals - Newton to Robinson."

Shaun Regenbaum, "Infinitesimals and Non Standard Analysis."

Yaroslav D. Sergeyev, "Numerical computations with infinities and infinitesimals."

Zor Shekhtman, "Unizor - Sequence Limit - Infinitesimals."

Jhevon Smith, "Math 308 Lecture 20 - Supremum Infimum Completeness Axiom and Archimedean Property."

Patrick Suppes, "Jens-Erik Fenstad, "On What There Is - Infinitesimals and the Nature of Numers" Part 1/2."

Patrick Suppes, "Jens-Erik Fenstad, "On What There Is - Infinitesimals and the Nature of Numers" Part 2/2."

Jeff Suzuki, "Newton and Infinitesimals."

tawkaw OpenCourseWare, "Unit II Lecture 2 Approximations and Infinitesimals."

UFBA Philosophy Lectures, "Zeno's Paradoxes and Mathematics - Ep. 3.3: Why infinitesimals were banished from mathematics."

UFBA Philosophy Lectures, "Zeno's Paradoxes and Mathematics - Ep. 3.8: Zeno's paradoxes and non standard analysis."

Vsauce, "How To Count Past Infinity."

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