We now live in modern times and the gif format is actually dead. It's been replaced primarily with webms and html5, please consider adding it to the bbcode, it's extremely easy :

https://forums.tigsource.com/index.php?topic=43843.0

Here's some random forum which they implemented it in.


Alternatively

https://www.phpbb.com/customise/db/e...on/mediaembed/