Fix streaming link for theatre room
Fix streaming link for theatre room

pyvec/cz.pycon.org-2017,benabraham/cz.pycon.org-2017,pyvec/cz.pycon.org-2017,pyvec/cz.pycon.org-2017,benabraham/cz.pycon.org-2017,benabraham/cz.pycon.org-2017