Wanikani Forums: Large Image Embedder
This is a script which re-embeds large images which the forums refuses to embed because they are too large. Works for normal images as well as gifs. You should, however, be aware that there is a reason as to why Discourse chooses not to embed these. They are heavy, take time to load, and slow down your experience. It does make life a lot easier, though.
I can’t guarantee this works 100% of the time, but it’s pretty damn close, and if you happen upon a broken image that hasn’t been fixed you just have to scroll up and down a bit until it fixes itself.