Recommended
How a TV Works in Slow Motion - The Slow Mo Guys
Why people recommend it
Recommended as a clear visual way to grasp how a CRT draws its picture line by line, seen through high-speed footage.
Watch for: A popular science visual rather than a circuit-level lesson
In their words
See How a TV Works in Slow Motion by the Slow-Mo guys for some super analysis.
Transistor on electronics.stackexchange.com, Aug 2019. CC BY-SA.
Watch this [video] video which gives a better understanding of the underlying principle.
Nishant on electronics.stackexchange.com, Oct 2018. CC BY-SA.