I have moved to a new web site; the embedding test is here. This version WILL NOT be further updated and remains only to maintain old links.

contentobjectimgiframeembedapplet
animated SVG image (no size) alternate content alternate content n/a
animated SVG image (sized) alternate content alternate content n/a
GIF image (no size) alternate content alternate content n/a
GIF image (sized) alternate content alternate content n/a