Embedding
No; this is the embed code for that video:
<iframe width="420" height="315" src="https://www.youtube.com/embed/R6tbABRT1sA" frameborder="0" allowfullscreen></iframe>
Found under the share tab>embed option under the vid on Youtube
This gives a preview in the user's post, the video may be watched without navigating away from HN1.
Thank you, JW.