@mariusGlad that you got the skin working for you.
As a recommendation for everyone, if you have an addon/skin that you rely on, don't update to new versions of Kodi on your main system until you've seen that the addon/skin is compatible with it.
You should be able to do that already.
Go into the PreShow settings and then to the trailers category. Enable Kodi Database (YouTube). This pulls whatever info Kodi has for the movie, which for most people will be YouTube links. If you have local files it will scan those. Then make sure you go to the general tab and rescan your content.
Next edit your sequence and edit the trailer module. You want the source to be content and the scraper to be Kodi Database.
Let me know if that works for you.