Recommended · for beginners
Diode Tutorial & How to build an AC to DC power supply
Why people recommend it
Covers diode basics and builds a transformer, rectifier and capacitor power supply; recommended within a beginner series, including on why parallel diodes do not share current.
In their words
An good explanation of what happens when you connect diodes in parallel can be found here
AK_ on electronics.stackexchange.com, Aug 2014. CC BY-SA.
Here's a tutorial on diodes and rectifiers.
AndrejaKo on electronics.stackexchange.com, Oct 2011. CC BY-SA.
This next video is on diodes and rectification but you you should definitely check how his whole electronics series.
sptrks on electronics.stackexchange.com, Feb 2012. CC BY-SA.