Improved YouTube Trailers for selected episodes (Calendar, Activity Dashboard, Friends Recently Watched), will now look up by Season and Episode numbers rather than just Show Title.
Added 'Trailers' to Trakt Episodes GUI Context Menu.
Added two new advanced settings to configure the default movie / tvshow trailer site. This is what is used when attempting to play an item that is not local.

Set the default TVShow / Episode trailer site to 'YouTube', IMDb still remains the default for movies but can be changed by user to iTunes or YouTube.

It may also be worth adding some new providers if there are any.