The HLS stream URL is read from the data-url attribute of the DOM node with the data-live=true attribute, so an API query is not needed in this case.
Plugin now finds the correct stream URL on kanald. Other sites are not affected by this change.
$ echo -e 'from tests.plugins.test_dogan import TestPluginCanHandleUrlDogan as A\n[print(s) for s in A.should_match]' | python | xargs -n1 -P1 streamlink
[cli][info] Found matching plugin dogan for URL https://www.cnnturk.com/canli-yayin
Available streams: 410k (worst), 570k, 850k, 1100k, 1400k (best)
[cli][info] Found matching plugin dogan for URL https://www.cnnturk.com/action/embedvideo/5fa56d065cf3b018a8dd0bbc
Available streams: 300k (worst), 750k, 1000k, 1200k, 1800k, 2800k (best)
[cli][info] Found matching plugin dogan for URL https://www.cnnturk.com/tv-cnn-turk/belgeseller/bir-zamanlar/bir-zamanlar-90lar-belgeseli
Available streams: 300k (worst), 750k, 1000k, 1200k, 1800k, 2800k (best)
[cli][info] Found matching plugin dogan for URL https://www.cnnturk.com/video/turkiye/polis-otomobiliyle-tur-atan-sahisla-ilgili-islem-baslatildi-video
Available streams: 300k (worst), 750k, 1000k, 1200k, 1800k, 2800k (best)
[cli][info] Found matching plugin dogan for URL https://www.dreamturk.com.tr/canli-yayin-izle
Available streams: 330k (worst), 490k, 780k, 1000k, 1600k (best)
[cli][info] Found matching plugin dogan for URL https://www.dreamturk.com.tr/dream-turk-ozel/radyo-d/ilyas-yalcintas-radyo-dnin-konugu-oldu
Available streams: 300k (worst), 750k, 1000k, 1200k, 1800k, 2800k (best)
[cli][info] Found matching plugin dogan for URL https://www.dreamturk.com.tr/programlar/dream-10
Available streams: 750k (worst), 1200k, 1800k, 2800k (best)
[cli][info] Found matching plugin dogan for URL https://www.dreamtv.com.tr/dream-ozel/konserler/acik-sahne-dream-ozel
Available streams: 300k (worst), 750k, 1000k, 1200k, 1800k, 2800k (best)
[cli][info] Found matching plugin dogan for URL https://www.teve2.com.tr/canli-yayin
Available streams: 330k (worst), 490k, 780k, 1000k, 1300k (best)
[cli][info] Found matching plugin dogan for URL https://www.teve2.com.tr/diziler/guncel/oyle-bir-gecer-zaman-ki/bolumler/oyle-bir-gecer-zaman-ki-1-bolum
Available streams: 350k (worst), 750k, 1000k, 1200k, 1800k, 2800k (best)
[cli][info] Found matching plugin dogan for URL https://www.teve2.com.tr/embed/55f6d5b8402011f264ec7f64
Available streams: 750k (worst), 1200k, 1800k, 2800k (best)
[cli][info] Found matching plugin dogan for URL https://www.teve2.com.tr/filmler/guncel/yasamak-guzel-sey
Available streams: 750k (worst), 1200k, 1800k, 2800k (best)
[cli][info] Found matching plugin dogan for URL https://www.teve2.com.tr/programlar/guncel/kelime-oyunu/bolumler/kelime-oyunu-800-bolum-19-12-2020
Available streams: 750k (worst), 1200k, 1800k, 2800k (best)
[cli][info] Found matching plugin dogan for URL https://www.kanald.com.tr/canli-yayin
Available streams: 360p (worst), 480p, 720p, 1080p (best)
[cli][info] Found matching plugin dogan for URL https://www.kanald.com.tr/embed/5fda41a8ebc8302048167df6
Available streams: 750k (worst), 1200k, 1800k, 2800k (best)
[cli][info] Found matching plugin dogan for URL https://www.kanald.com.tr/sadakatsiz/fragmanlar/sadakatsiz-10-bolum-fragmani
Available streams: 750k (worst), 1200k, 1800k, 2800k (best)