Capacitors are one of the most esssential elements of electronics and if you're working on DIY projects it's important to know how they work. "C is for Capacitor" is a video from Adafruit that makes it easy to understand what a capacitor does.
In the simplest terms, capacitors store energy which enables them to direct current, tune radios, stabilise power flow, and more. Capacitors come in all shapes, sizes and colours so it's often a bit confusing to figure out which capacitor is best for a job. You're going to use capacitors in just about every DIY electronics projects you do, so it's a good idea to know how they work.
"C is for Capacitor" [YouTube]