Right).</p>

<p>Below these three SourceBuffer containers is a dashed line, with an indication
that the top half (MediaSource plus the three SourceBuffer containers) are taken
from the Media Source API, while the details to follow are taken from the
HTMLMediaElement.<p>

<h3 id='sourcebuffer1'>Flowing down from SourceBuffer 1</h3>

<p>Flowing down from SourceBuffer 1 is a blue triangle with three arrows pointing
to three process indications, each labeled Track Buffer.</p>

<p>The first Track Buffer from the