HTML Import Not Showing On GitHub

[ProsperousHeart]

Describe the bug When using the following, it does not render on GitHub - works fine locally:

# https://gist.github.com/christopherlovell/e3e70880c0b0ad666e7b5fe311320a62#file-display-py-L5
from IPython.display import HTML

# Youtube or Facebook embed
HTML('<iframe src="https://www.facebook.com/plugins/video.php?height=314&href=https%3A%2F%2Fwww.facebook.com%2FKitten4Him%2Fvideos%2F613908749722124%2F&show_text=false&width=560&t=0" width="560" height="314" style="border:none;overflow:hidden" scrolling="no" frameborder="0" allowfullscreen="true" allow="autoplay; clipboard-write; encrypted-media; picture-in-picture; web-share" allowFullScreen="true"></iframe>')

To Reproduce Steps to reproduce the behavior:

1. Create a Jupyter notebook locally with above or similar code
2. Push to Github repo
3. Attempt to view notebook

Expected behavior Be able to view YouTube/Facebook/Vimeo video in notebook in GitHub as able to do locally.

Screenshots You can see current example here.

Desktop (please complete the following information):

• OS: Windows
• Browser: Chrome
• Version: 95.0.4638.69