As commented by Darktooth in 2016, there is a Xenforo limit for this that we can't really get around that makes this impossible I believe.
False. You can edit the usergroup for normal people to have a higher limit than currently just by editing a simple value. The separation of the limit for each usergroup is the very reason why staff have a higher size limit than normal people.
lets be honest, a higher limit = higher quality gif of the beautiful face +1 even if I said that before
If you scrolled a bit more: But since Highwon hardly changes anything these days, +1 I can barely even upload PNGs, let alone a gif
I was just remembering the post. I didn't bother looking back to see what was actually written back then. I +1 nonetheless.