@betro-hakala I don't even know what you want to be transparent. Also, if you are using Vanilla theme (not Persona) then the theme's options won't be in NodeBB Category options, those are completely different.
Could you send a screenshot of what you want transparent? That would help us help you.
There are times when access to social media like youtube, vimeo is not allowed and the embedded videos do not play. Is there a way to upload a video directly in the topic? Does a plugin exist for this matter?
Any kind of help is appreciated.
Thank you in advance.
@smi-jonathan global moderators exist as a group to essentially be admins but without access to the ACP. If you want a restricted group of admins, that's what you're looking for. If you'd like them to be able to do more, then I'd suggest opening as issue on Github. As for your particular request, no, this isn't possible without a plugin.