Not exactly sure why this is occurring but for any movie that I have a trailer for (using “-trailer” in the label), the trailer shows up twice. I thought it was Plex showing it’s own trailer but…
It’s always the exact same trailer I’ve added manually
Movies that I haven’t added trailers to do not have trailers at all
Plex web only shows the trailers in the “Extras” section if their is more than one available trailer.
So, if you have enabled the download trailers and extras option, but have not added your own trailer, the only place to see the trailer is from the icon at the top of the web page. This is also true if you have added a trailer yourself, and Plex was not able to find a trailer. One trailer = just the tcon, more than one trailer = included in the “extras” section.
If you look at the XML for the movie, you will probably see “Extras size =2.” One of those is your trailer, the other is the downloaded version . You should see something like