A Youtube video would allow downloading and watching it offline or in a secure manner.

They should at least tell what 3rd party JS domains are required to watch the video. Allowing vooza + wistia still shows a black window instead of a video.

The other 3rd party domains, are evil facebook, google analytics, twitter and optimizely, and do not sound as if they are required for watching the video.

It looks as an other example of JS done wrong.

And yes - i've tried it in my only browser where I allow flash.