I've been enjoying this 3 part German production covering many of the best aspects of Bulgaria. Even though I've been to lots of places, there's still plenty to discover, especially off the beaten track:
[You must be registered and logged in to see this link.]There is some great wildlife photography, and the commentary may be useful to identify various birds you may have seen or heard. Or even snakes!
Plus real village life from various areas.
Hope you enjoy it as much as I have, it's fuelled my desire to get back over there and explore some more.