Let's try: https://github.com/boomzillawtf/nodebb-plugin-youtube-embed#readme
plugin was forked from nodebb-plugin-youtube-lite.

After installation restart and refresh browser or clear browser cache - CTRL + F5

@Darwin
Check:
https://www.w3schools.com/cssref/css3_pr_mediaquery.asp
and add display:none: to your div to hide in the mobile version (in selected resolution)

https://stackoverflow.com/questions/16550485/hide-div-tag-on-mobile-view-only

Use Custom Header to add:

@darwin said in help to header banner:

I´am using persona theme and just want a banner right under the navbar and above the "recent cards"