Augmented Generic IE

I changed one of regexes for the generic IE to handle the case in which file is a key inside a dictionary. This occurs sometimes and can be used to handle cases like:
http://www.mp4upload.com/embed-rt2yx5n01ydl-650x372.html
in which:

I also made 'video' the default title for the generic IE. I would argue that the generic IE needs to be a little more forgiving about not being able to find a correct title (the previous link is an example of youtube-dl not finding the correct title). Youtube-dl should not refuse to download a video because a title was not provided by the site.