It works ok for me, including filtering anything that implies G5, like characters who are G5 only.
Is the problem that there are some G5 images that are not tagged correctly? For a test, do you see this image or the spoiler? Using your filter, I see the spoiler, so I hope that’s what you see, too.
(edit: changed the image to a static image so that we don’t have to deal with ‘webm lag’)