The Emergence of Network Science - posted by Cornell University, Department of Mathematics (in 2015):

https://www.cornell.edu/video/emergence-of-network-science (47 minutes)

An Introduction to network science – From a Physicist/mathematician perspective (Dr Renaud Lambiotte, University of Oxford, via the Alan Turing Institute in 2018):

https://www.youtube.com/watch?v=L6CqqlILBCI (1 h 40 minutes)

Network Science 101 – From a social network(ing) perspective (from Dr Danielle Varda, Visible Network Labs and Colorado University, Denver in 2019):

https://visiblenetworklabs.com/guides/network-science-101/ (22 min)

Visualisation Tools & Examples:

InfraNodus: https://infranodus.com/
- Demonstrations: InfraNodus Demos

Gephi (making graphs handy): https://gephi.org/
- Demonstration: Introduction to Network Analysis and Visualization (Tutorial)

Flourish: https://flourish.studio/
- Making interactive network graphs
  - Visualisation guides
  - Visualisation templates
  - Visualisation examples