Growing up in the Philippines, I used to hear stories similar to the video above. Although the Philippines is mainly Catholic like Poland, the latter seems to be less superstitious. In the Philippines, I remember being told to ask permission from the spirits before "watering" the plants with my urine. I peed in the woods while in Poland, and I never required any such permissions. Haha. :)
I tried asking my other half for any Polish supernatural stories before, but she didn't seem to have any. The odd thing is that she can't stand watching horror flicks, while I can easily sit back and enjoy it in the darkness.