Looks like some videos are only available for particular devices
(e.g. http://player.ooyala.com/player.js?embedCode=x1b3lqZDq9y_7kMyC2Op5qo-p077tXD0
is only available for ipad)
Working around with fetching URLs for all the devices found starting with 'unknown'
until we succeed or eventually fail for each device.
Be on the lookout, it might be modified in pull requests.
When I come back from my vacation (in three days from now), I'll start looking whether we really need the compat binary.