Propaganda and lies in Germany's Poland

Schindler's factory was very eye opening about how technology in communications can affect people's lives. When German started invading Poland, they made the Polish residents send letters to family members pretending that everything was great. The Germans use of a newer technology, Television also helped their agenda, they filmed the locals going about a "normal day" with great fortune and smiles on their faces; this was propoganda and lies, nothing more... I believe that if something like this happened today, the internet would be a great tool to let others around the world know how bad things were getting and it might have lead to other countries helping sooner.