Health Insurance Explained in 5 Minutes by the Kaiser Family Foundation
Watch and learn. KFF does an excellent job of boiling down all of the insanity into just over 5 minutes (not that this reduces how stupid the system is, even under the ACA, but it at least explains it).
NOTE: The Open Enrollment dates listed at the end are obviously wrong because this video is from last year. For 2016, Open Enrollment runs from November 1st, 2015 through January 31st, 2016.