Stopped working

Confirmed, does not work reliably.

See related open ticket for core in trac: https://core.trac.www.ads-software.com/ticket/28474

hi there, I just posted a note about my experience with the plugin:

I just tried the new plugin in 4.2.1 – it took me a while to realise that although it appears not to work (WordPress displays an error message HTTP error when I upload an animated gif), the uploaded image does actually appear in the media library, still animated perfectly

Maybe the same thing is happening with your site?