We had a hands-on class on knot tying with lots of practical experience.  Unfortunately, we were not able to get a good video of the class, but the slides are available here:

Slides:  Whats_KNOT_to_like.pdf

Slides:  Grounding_and_Bonding.pdf

Slides:  Troubleshooting_101.pdf

Two part presentation:

Slides:  Antenna_Physics.pdf

Slides:  Cross_Band_Repeat.pdf

Slides:  When_Disaster_Strikes.pdf

Slides:  POTA

Slides:  Ham_Nets_and_Message_Passing.pdf

Slides will be available soon.

Slides:  Antenna Fundamentals