Cybermedieval? No, a Gathering Place for Lunatics!

I'm awesome! You have traveled through time and dressed it for me! Other people's golden fingers move sideways across time and space. My golden finger... As a time traveler, you have unique past life knowledge! Not a buddy? What does it mean that the level of science and technology is more advanced than in my previous life, but the level of culture is still stuck in the middle ages? Is this scientific? Yay! In this way, you won't directly warm up a street just because you publish some scientific remarks... So how do I turn around? Can I really survive?