This is a terrific explanation of the Patient Protection and Affordable Care Act (PPACA) better known as Obamacare as produced by KahnAcademy.com. Kahn Academy provides great educational guides on a variety of topics, and this is no exception. This 7 minute video was published in 2012, so some of the finer points may have been updated in the years that followed, but thit still provides a nice overview of how the PPACA works from an unbiased source.
Video duration (7:13)
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How does Obamacare work (another educational piece)