When displaying Extras (trailers, scenes, etc), Plex Web cuts off the end of the filename if it is too long (over 32 characters or so):
Simply wrapping the filename to multiple lines would make it much easier to determine which extra you want to watch.
Early 2021 clean-up: Plex is using the full name (except for the file extension) – some clients might not display the full title in which case the title will either roll back and forth or display when hovering over the item.