Whan i have this extension running the video on National Geographic is not loading at all: http://video.nationalgeographic.com/video/news/jaguar-attacks-crocodile
I have experimental rules for NG turned off.

When i disable the extension and refresh the page it works as it should.

My specs:
Linux Mint 17.1 x64
Chrome version 41.0.2272.118 (64-bit)
HTTPS everywhere version: 2015.4.7