Some physics-related videos.

My personal favorite, because it demonstrates Arthur C. Clarke̕s statement that ″Any sufficiently advanced technology is indistinguishable from magic.″ Frogs are mostly water, water is diamagnetic, so a small frog can be levitated by a very strong magnetic field. Reciting an appropriate spell is optional. https://www.youtube.com/watch?v=A1vyB-O5i6E

Mechanics.

Freefall on the moon. https://www.youtube.com/watch?v=KDp1tiUsZw8

Apparent weightlessness in a free-falling airplane. https://www.youtube.com/watch?v=LWGJA9i18Co

https://www.youtube.com/watch?v=3rL7fR36aM0

The tablecloth trick. (Demonstrates inertia.) https://www.youtube.com/watch?v=2VcdBuC0IPw

The Bernoulli effect. (Fluid mechanics.) https://www.youtube.com/watch?v=WDGNcmEOjs4

Standing waves:

Collapse of the Tacoma Narrows bridge https://www.youtube.com/watch?v=lXyG68_caV4

Ruben's Tube. Start around 6:00. https://www.youtube.com/watch?v=dihQuwrf9yQ

Electricity.

Several demonstrations. https://www.youtube.com/watch?v=ViZNgU-Yt-Y

Electric hot dog. https://www.youtube.com/watch?v=Sol6uJo9pMM

Electromagnetism.

Tesla coils. https://www.youtube.com/watch?v=3FpjcOWwiI4

Several demonstrations involving magnetism. https://www.youtube.com/watch?v=0V2A-o1wrOI

Light & Optics.

Mirage. (Light being refracted by a layer of hot air near the ground.) https://www.youtube.com/watch?v=S9CztTYuGqg

Thin film interference in a bubble. https://www.youtube.com/watch?v=XtAvCtg3D1U

Nuclear physics.

A chain reaction demonstrated with ping pong balls. https://www.youtube.com/watch?v=g0mpli40G4E

Various topics in one video. https://www.youtube.com/watch?v=awFCNRz7d8c

https://www.youtube.com/watch?v=IzQsYnLz2Gc

https://www.youtube.com/watch?v=2L0ZHxcoWhM