Using global metadata for script cleaning

[Battleman]

Apparently, on the video page (after the pw is any), there is a JavaScript section dedicated to "global data", containing the title, the mp4 url and a lot of interesting stuff. Instead of wrangling with regex, this would be more convenient.

Problem is, this is within a <script> tag. There may be no simple way to interpret that with pure python (aka without BeautifulSoup).

Also, this is useful for #10, as the previous/current/next timestamps are all stored here.