Different teachers have very different teaching styles. Find out what suits you.
1) A disembodied voice and a board: welkerjason is an IB teacher and text-book writer. He likes music as an introduction.
2) A male teacher: pajholden teaches 11th and 12th grade economics, so most of the seventy or so videos are relevant.
3) A female teacher: jodiecongirl has uploaded over 100 videos. They are mainly directed at first year university students, so be selective in choosing the topic