This video discusses the basic function of triggering on both analog and digital oscilloscopes. It discusses what the end goal is, the differences in the underlying operation of the triggering function in analog and digital scopes, and how to setup a the most basic (and most common) trigger - a simple edge trigger. Links to other Oscilloscope Trigger video are listed below, as well as a link to the PDF file of the notes from this video.
Notes from this video:
http://www.qsl.net/w2aew/youtube/DemystifyTriggering.pdf
Basic analog oscilloscope trigger controls:
https://www.youtube.com/watch?v=OFGm-Pel4Hg
AUTO Triggering explained:
https://www.youtube.com/watch?v=BKjJK1rsZmM
Using triggering to capture signals at different frequencies:
https://www.youtube.com/watch?v=LonFeZh2WL4
https://www.youtube.com/watch?v=hk0ZSRV8zIQ
Making a risetime measurement:
https://www.youtube.com/watch?v=eRA1Mx506fw
Eye patterns on an oscilloscope:
https://www.youtube.com/watch?v=cL7QsELuv_M
Using delaying timebase to "zoom"
https://youtu.be/54roz8IUoVI