I don't think what you are seeing is an image in the normal sense - but an HTML effect. So I can't really see how you are likely to capture it except with a camera. Most digital cameras can capture video clips - even a webcam at low resolutions.
Or you could construct a web page with an image, add the glitter code to it - then send that in an email.
But since you never actually have a glittery image, I can't see how it can ever be converted to, say, an animated gif.