[indavideo] Add new extractor

Closes #2147.

youtube_dl/extractor/__init__.py

@@ -242,6 +242,7 @@ from .imdb import (
 )
 from .imgur import ImgurIE
 from .ina import InaIE
+from .indavideo import IndavideoIE
 from .infoq import InfoQIE
 from .instagram import InstagramIE, InstagramUserIE
 from .internetvideoarchive import InternetVideoArchiveIE