Poncelet's Porism - Numberphile
Poncelet's Porism (Closure Theorem): Family of 7-Periodics between Two Ellipses in General Position
Poncelet's Porism - a Short Proof
Poncelet's theorem - a talk by Prof Joe Harris
Poncelets Porism
Poncelet's Porism for Quadrilaterals
Multiple-Caustic Poncelet I: a curious N=6 quasi-porism
Poncelet's flow
Poncelet in Circle Pencil I: the geometric Flamenco of 5-Periodics with 4 caustics
Demonstration of Steiner's Porism
Poncelet Porism and the Elliptic Billiard: N=3,4,5,6 Family of N-Periodics and their Caustics
XSection • Poncelet
Joined at the hip: Brocard Porism, Steiner Ellipses, and the Homothetic Poncelet Pair
Seminar (online): V. Dragovic "Introduction to Poncelet porisms and ramifications"
It takes 2 to tango: Brocard-Poncelet Porism, stationary Brocard Points and invariant Brocard Angle
Poncelet theorem and Painlevé-VI - Vasilisa Shramchenko (25 June, 2014)
Poncelet 3-Periodics in a Non-Concentric, Unaligned Ellipse Pair
Locus invariants of projected Poncelet triangles I: Chapple's porism w/ a rotating caustic
Poncelet n=4 between two identical unit circles
Multiple-Caustic Poncelet IV: cases when a pseudo-porism is maintained and cases when it fails