[murrtube] Add extractor (#2387)

Authored by: cyberfox1691

yt_dlp/extractor/extractors.py

@@ -890,6 +890,7 @@ from .mtv import (
     MTVItaliaProgrammaIE,
 )
 from .muenchentv import MuenchenTVIE
+from .murrtube import MurrtubeIE, MurrtubeUserIE
 from .musescore import MuseScoreIE
 from .musicdex import (
     MusicdexSongIE,