[vtm] Add extractor (closes #9974)

Implementation of the approach described in #9974.

youtube_dl/extractor/extractors.py

@@ -1174,6 +1174,7 @@
 from .vporn import VpornIE
 from .vrt import VRTIE
 from .vrak import VrakIE
+from .vtm import VTMIE
 from .vube import VubeIE
 from .vuclip import VuClipIE
 from .vvvvid import VVVVIDIE