importing from other apps


I have a question regarding imports from external apps; more specifically, whether support for import lies with infuse or with the app I’m trying to import from. I store my media on a WD my cloud and it’s excellent to stream from home while I’m on the same network, but when I’m away from my network, I have to use WD’s my cloud software to watch my videos, which doesn’t support mkv files. I’m trying to understand if it’s something you guys can deal with or if I should go chase up WD to allow exports to outside apps. Thanks in advance.