Sorbian language

If you don’t the language: It is a western slavic language spoken in Eastern Germany. It is divided into Lower Sorbian and Upper Sorbian. Upper Sorbian is more similar to Czecho-Slovak and is spoken in Lusatia (Saxony) and Lower Sorbian is more similar to Polish and spoken in Brandenburg. Both varieties are endangered but Lower Sorbian is more endangered. East Germany was once slavic settled and many slavic languages like Polabian and Slovincian died out. Only Sorbian survived. And because of the name similarity to Serbs Sorbs are sometimes even associated with Serbs. A question to all slavic speakers in the Balkans. Did you know that they exist? and how much could you understand of this language when you watched videos of persons who spoke it?