You should complete it every other year. Though I don't know if it is call Sea 222 any more, there are four videos on NFHS to watch Heat, Concussion, Blocking/Tackling, and Sudden Cardiac. I believe these courses are required by law.
Yes that is still an illegal formation. The rule clarification was in the case where the offense lines up with 10 men on the field. This will keep them from also getting a penalty for an illegal formation if say a wideout forgot to go out on the field.