This video covers the basics of what the reverse recovery period is in a diode, some of the parameters that affect the reverse recovery time, and a simple measurement setup to observe the reverse recovery characteristic. Other related videos are:
A PIN Diode based T/R switch:
https://www.youtube.com/watch?v=A1BAq0KxIdc
Basics of PIN Diodes and RF switching:
https://www.youtube.com/watch?v=XpYsCM_Wf50
Basics of using diodes as switches:
https://www.youtube.com/watch?v=YBNIq_d56sA
Notes page:
http://www.qsl.net/w2aew/youtube/reverserecovery.pdf