Hi,
This plugin only allows mp4 or webm., but can convert your gif to a video.
It works with Vizustella Plugins , i am using battle core + a bunch of other plugins.
Viewing post in VideoBattleBackground - Plugin for RPG MAKER MZ comments
No problem,
You can aks on my server: https://discord.gg/XuqdbX7CR
Or just add me on Discord and dm me: @paradajz93