[masters] Add extractor (#3358)

Closes #3240
Authored by: m4tu4g

yt_dlp/extractor/extractors.py

@@ -849,6 +849,7 @@ from .markiza import (
     MarkizaPageIE,
 )
 from .massengeschmacktv import MassengeschmackTVIE
+from .masters import MastersIE
 from .matchtv import MatchTVIE
 from .mdr import MDRIE
 from .medaltv import MedalTVIE