Carl,
SVG is non-interactive on the forum because the bbcode formats it as a simple image.
A custom bbcode to support interactive SVG, untested, may look something like this:
<object data="my.svg" type="image/svg+xml">
<img src="my.jpg" />
</object>
The demo page should work, in most browsers, I think. Animation controls and all.
Did you try the Demo Page link?
Thanks for testing.