[hbo] Improve extractor support for different URL scheme

[SeanPM5]

• I've verified and I assure that I'm running youtube-dl 2016.10.07
• At least skimmed through README and most notably FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones

What is the purpose of your issue?

• Site support enhancement

Description of your issue, suggested solution and other information

I noticed there is already an extractor for some HBO videos, but it only works when the URL is in a specific format ending with a video ID. There are many videos on HBO website that do not contain a video ID in their URL (examples listed below). However if you view page source on these and search for "videoId" you will find the video ID for it, which you can then use to re-construct a new working URL according to extractor requirements.

So basically if you can add these types of links to valid URL list on HBO Extractor.

Example URLs:

• Single video: http://www.hbo.com/westworld/about/video/westworld-teaser-trailer.html?autoplay=true
• Single video: http://www.hbo.com/girls/episodes/5/52-i-love-you-baby/video/ep-52-inside-the-episode.html?autoplay=true
• Single video: http://www.hbo.com/game-of-thrones/about/video/season-5-invitation-to-the-set.html?autoplay=true

[yan12125]

Thanks for the report. Those URLs will be supported in the next version.

[SeanPM5]

Great, thanks very much for adding this!