Is there anyway to display a custom message to the client?
I've developed a channel which lists various videos even if they're technically not available yet. Trying to view one calls the service which then finds out if the video is available. If it isn't, I raise Ex.MediaNotAvailable which is mentioned somewhere (can't remember where I found it), but on the iOS client, that results in an extremely unhelpful message of "An unknown error occurred -12880".
I'd much rather be able to say "This video is not yet available" as you might imagine.