Thread:Rappy 4187/@comment-3495717-20151228195849

The one shown in the revision sent for review is exactly the same as the one being imported (I copy & pasted it directly from shining-armor's wiki), only with minor changes to the existing tags in order to:
 * Take up less room in the chat; 300px is far too big for images and the video thumbnail size is even bigger than that.
 * Give a max-height value for images; max-width is repeated twice.
 * Retain an image's aspect ratio; the current code makes them square if both width and height exceed 300px.
 * Link to the full-sized image upon click; even 300px is too small for most images.
 * Make the tags more accurate to their actual BBCode counterparts; images are wrapped within [img]URL[/img] tags, not [img URL], and videos are wrapped within [youtube]URL[/youtube] tags, not [youtube URL].

Unless it is possible to change the existing tags in the same way you can add new ones, then I insist that you reconsider simply importing it. 