Fixes InvalidStateError failures in FF and more.

Fixes HD button
Disables Fullscreen mode in the Studio
Fixes ui controls bug

lms/envs/common.py

@@ -46,6 +46,7 @@ DISCUSSION_SETTINGS = {
 
 # Features
 MITX_FEATURES = {
+    'IS_CMS': False,
     'SAMPLE': False,
     'USE_DJANGO_PIPELINE': True,
     'DISPLAY_HISTOGRAMS_TO_STAFF': True,
@@ -72,7 +73,7 @@ MITX_FEATURES = {
     'ENABLE_TEXTBOOK': True,
     'ENABLE_DISCUSSION_SERVICE': True,
     # discussion home panel, which includes a subscription on/off setting for discussion digest emails.
-    # this should remain off in production until digest notifications are online. 
+    # this should remain off in production until digest notifications are online.
     'ENABLE_DISCUSSION_HOME_PANEL': False,
 
     'ENABLE_PSYCHOMETRICS': False,  # real-time psychometrics (eg item response theory analysis in instructor dashboard)

lms/templates/videoalpha.html

@@ -12,6 +12,8 @@
   data-streams="${youtube_streams}"
   % endif
 
+  data-in-studio="${settings.MITX_FEATURES['IS_CMS']}"
+
   ${'data-sub="{}"'.format(sub) if sub else ''}
       ${'data-autoplay="{}"'.format(autoplay) if autoplay else ''}
   % if not settings.MITX_FEATURES['STUB_VIDEO_FOR_TESTING']: