[videobam] Add support for videobam.com (Closes #2411)

youtube_dl/extractor/__init__.py

@@ -241,6 +241,7 @@ from .vesti import VestiIE
 from .vevo import VevoIE
 from .vice import ViceIE
 from .viddler import ViddlerIE
+from .videobam import VideoBamIE
 from .videodetective import VideoDetectiveIE
 from .videofyme import VideofyMeIE
 from .videopremium import VideoPremiumIE