The Poland's Linguistic Heritage database website provides:

NOTE related to the usage of audio and video recordings:

The annotations of video recordings were created in ELAN software, while audio files were annotated using ANNOTATION PRO. In order to open the annotated files please download the following software tools (free of charge): [in case of ELAN you have to choose also your operating system]

The ELAN annotated recordings consist of compressed (.zip, .rar) folders, which need to be:
- downloaded as a whole,
- unpacked (unzipped),
- opened by clicking the .eaf file.