Is it possible to merge 2 webm video streams into one stream (in picture)
<p>Is it possible to record 2 webm videos (with <code>WebRTC</code>) and then merge them into one stream (picture in picture).</p>

<p>Example:</p>

<blockquote>
  <p>recording A shows camera A (streams out)</p>
  
  <p>recording B shows camera B (streams out)</p>
</blockquote>

<p>stream A shows one frame with A+B as merged stream (interview between two people)</p>