More types for Group by type?

Sorry if this has been asked (and answered) before.

I'm trying to get DS to group my search results by type. I'm using Media and File Entity and Solr indexes images, videos (youtube references) and articles (nodes).

DS groups the search result and manages to group articles and image files as it should. Videos on the other hand fall under the category Other. Ideally, I'd like to specify wrapper and title on the GROUP BY TYPE SETTINGS area on the DS admin for search results.

I guess I'm missing something blatantly obvious somewhere but please, a hint?