Download more metadata from SVT Play

[ChlorideCull]

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Description of your issue, suggested solution and other information

The extractor for SVT Play doesn't grab all metadata, most notably description, season_number, and episode_number. It's available in the root['__svtplay'] JSON object that's already grabbed by the extractor, under "videoPage" > "video", under the names description, season, and episodeNumber.

This is a relatively simple change, I'll probably fix it myself if no one else gets to it first.

Here's an episode with these properties, for convenience.

[ChlorideCull]

Apparently there's an API, as used by the unofficial Kodi addon, which can be used instead of scraping the site.

I'll rewrite the extractor to use the API instead of scraping the pages when I have time.