Hello Roman,

i had the same Problem. But i get other Messages before Segmentation fault.

# /usr/share/qarte/qarte
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
15:27:38: INFO - core Set workspace
15:27:38: INFO - core Config not found, use default
15:27:38: INFO - core Build main window
15:27:38: INFO - artetv Fetch page: https://www.arte.tv/fr/guide/20190821/
15:27:38: WARNING - artetv urllib error: https://www.arte.tv/fr/guide/20190821/, <urlopen error unknown url type: https>
15:27:38: INFO - artetv Fetch page: https://www.arte.tv/fr/guide/20190822/
15:27:38: WARNING - artetv urllib error: https://www.arte.tv/fr/guide/20190822/, <urlopen error unknown url type: https>
15:27:38: INFO - artetv Sorting videos
15:27:38: INFO - artetv Fetch page: https://www.arte.tv/fr/guide/20190823/
15:27:38: WARNING - artetv urllib error: https://www.arte.tv/fr/guide/20190823/, <urlopen error unknown url type: https>
15:27:38: INFO - artetv Sorting videos
15:27:38: INFO - artetv Fetch page: https://www.arte.tv/fr/guide/20190824/
15:27:38: WARNING - artetv urllib error: https://www.arte.tv/fr/guide/20190824/, <urlopen error unknown url type: https>
15:27:38: INFO - artetv Sorting videos
15:27:38: INFO - artetv Fetch page: https://www.arte.tv/fr/guide/20190825/
15:27:38: WARNING - artetv urllib error: https://www.arte.tv/fr/guide/20190825/, <urlopen error unknown url type: https>

(python3:5011): GStreamer-CRITICAL **: 15:27:38.874: gst_element_set_state: assertion 'GST_IS_ELEMENT (element)' failed
15:27:38: INFO - artetv Sorting videos
15:27:38: INFO - artetv Fetch page: https://www.arte.tv/fr/guide/20190826/
15:27:38: WARNING - artetv urllib error: https://www.arte.tv/fr/guide/20190826/, <urlopen error unknown url type: https>
15:27:38: INFO - artetv Sorting videos
15:27:38: INFO - artetv Fetch page: https://www.arte.tv/fr/guide/20190827/
15:27:38: WARNING - artetv urllib error: https://www.arte.tv/fr/guide/20190827/, <urlopen error unknown url type: https>
15:27:38: INFO - artetv Sorting videos
15:27:38: INFO - artetv Fetch page: https://www.arte.tv/fr/guide/20190828/
15:27:38: WARNING - artetv urllib error: https://www.arte.tv/fr/guide/20190828/, <urlopen error unknown url type: https>
15:27:38: INFO - artetv Sorting videos
15:27:38: INFO - artetv Fetch page: https://www.arte.tv/fr/guide/20190829/
15:27:38: WARNING - artetv urllib error: https://www.arte.tv/fr/guide/20190829/, <urlopen error unknown url type: https>
15:27:38: INFO - artetv Sorting videos
15:27:38: INFO - artetv Fetch page: https://www.arte.tv/fr/guide/20190830/
15:27:38: WARNING - artetv urllib error: https://www.arte.tv/fr/guide/20190830/, <urlopen error unknown url type: https>
15:27:38: INFO - artetv Sorting videos
15:27:38: INFO - artetv Fetch page: https://www.arte.tv/fr/guide/20190831/
15:27:38: WARNING - artetv urllib error: https://www.arte.tv/fr/guide/20190831/, <urlopen error unknown url type: https>
15:27:38: INFO - artetv Sorting videos
15:27:38: INFO - artetv Check thumbnails
15:27:38: INFO - artetv Thumbnails completed
15:27:38: INFO - artetv Found 0 videos in 0.05391716957092285 sec.
Segmentation fault

The error Segmentation fault seems came from an empty, invalid result set of the URLs/file list.
Something can be wrong in your Installation.
In my case the python package was compiled with HTTPS Option, but some/one package was missed.
After installing the newest package of libssl1.1_1.1.1 (Installed Version libssl1.1_1.1.0g) the program works fine.

# python3
Python 3.6.8 (default, Jan 14 2019, 11:02:34) 
[GCC 8.0.1 20180414 (experimental) [trunk revision 259383]] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import ssl
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.6/ssl.py", line 101, in <module>
    import _ssl             # if we can't import it, let the error propagate
ImportError: /usr/lib64/libssl.so.1.1: version `OPENSSL_1_1_1' not found (required by /usr/lib/python3.6/lib-dynload/_ssl.cpython-36m-x86_64-linux-gnu.so)
>>> 

The other error fo gstreamer has the same reason: installed package Version to old.

Good luck!