The url only needs to have the 'idVideo' field in the query, in any position.
We have to set the 'void=oui' in the webpage url, so that we get the file name.
The 'Content-Type' header must be set for disabling the family filter.
The 'flashversion' cookie is only needed for AnyClip videos.
Added tests for standard metacafe videos and for age-restricted videos.
Also set the 'age_limit' field.