another video about it, there's plenty of them if u write down ,,język wilamowski" on youtube
For non-polish speakers:
This language is really close to Dutch because this small town (that lies close to my family town:D) was built in XIII century by Flemish immigrants. This language was used by all the inhabitants of this town until 1945 when communists started to destroy it. Now there's only some 100 people who speak it (the town has some 3000 inhabitants) but there are some young people who got interested in it. One of them Tymoteusz Król in the age of 14 managed to add this language to the register of language of the Library Of Congress in Washington. So maybe basics are not very good but there's a lot of will to renew and develop this language.