http://www.hd-trailers.net provide a vast range of trailers in HD including new and upcoming release.
Curently their RSS url feed - http://feeds.hd-trailers.net/hd-trailers - does work on Serviio without any plugins.
But few issues.
1. Trailers list with no thumbnail of the movie
2. Many WARN logs as "Failed to retrieve online item information for http://trailers.apple.com.
3. No control over what quality resolution to play
4. Cant view the vast catalog of HD trailers this site contains
Ideal for Web Resource for:
Most Watched Trailers
Top 10 Movie Trailers
Opening This Weeks Trailers
Coming Soon Trailers