[NovaPlus] New site support request

[JCGoran]

Please follow the guide below

• You will be asked some questions and requested to provide some information, please read them carefully and answer honestly
• Put an x into all the boxes [ ] relevant to your issue (like this: [x])
• Use the Preview tab to see what your issue will actually look like

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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2019.03.18. If it's not, read this FAQ entry and update. Issues with outdated version will be rejected.

• I've verified and I assure that I'm running youtube-dl 2019.03.18

Before submitting an issue make sure you have:

• At least skimmed through the README, most notably the FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones
• Checked that provided video/audio/playlist URLs (if any) are alive and playable in a browser

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

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If the purpose of this issue is a site support request please provide all kinds of example URLs support for which should be included (replace following example URLs by yours):

• Single video: https://novaplus.dnevnik.hr/product/serije/1178-lud-zbunjen-normalan
• Single video: https://novaplus.dnevnik.hr/product/emisije/22699-vijesti-sx

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Description of your issue, suggested solution and other information

This is a site support request for NovaPlus.
The content is geoblocked outside of Croatia, but is accessible using a Croatian-based proxy.
The videos do not appear to be embedded in the source, but in a piece of javascript (flowplayer plugin), which fetches a playlist.m3u8 file, which can then be processed using, for instance, ffmpeg.
If anyone has a suggestion on how to achieve the above in youtube-dl, I'd be happy to try to build an extractor.