Include somewhere with image on error page. Probably in video alt.

Image by <a href="https://pixabay.com/users/alexantropov86-2691829/?utm_source=link-attribution&amp;utm_medium=referral&amp;utm_campaign=image&amp;utm_content=2213140">Alexander Antropov</a> from <a href="https://pixabay.com/?utm_source=link-attribution&amp;utm_medium=referral&amp;utm_campaign=image&amp;utm_content=2213140">Pixabay</a>