These 2 videos are meant to be primer videos for point of care ultrasound. These were designed to be used as part of a procedural education course. The physics and knobology presentations are meant as an introduction and not as exhaustive or comprehensive reviews. Think of them as for people who are starting to learn procedural ultrasound, off service residents who need an introduction, or even medical students rotating in EM.
Enjoy and feel free to use as you see fit, no point recreating the wheel.