unable to find module extractors

[atuxnull]

after searching for a way to download some videos from ertflix, i came across your page. i downloaded the code, made it executable, but i am unable to download anything, as i am getting errors:

pi@vpn:~/ert-downloader $ python ert-downloader.py https://www.ertflix.gr/vod/vod.168731-o-arkhitsigkounes
Traceback (most recent call last):
  File "ert-downloader.py", line 1, in <module>
    from extractors import archive_extractor, ertflix_extractor, star_extractor, megatv_extractor
ImportError: No module named extractors
pi@vpn:~/ert-downloader $

here are my system details:

pi@vpn:~/ert-downloader $ python -V
Python 2.7.16
pi@vpn:~/ert-downloader $

i am getting the same error for any link from the the other providers as well:

- ert
- star
- mega
- alhpa

Any hints on how i could overcome the problem, please?