Security problems and maintenance

[josemgarciar]

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• You will be asked some questions, please read them carefully and answer honestly
• Put an x into all the boxes [ ] relevant to your pull request (like that [x])
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• Searched the bugtracker for similar pull requests
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• Read youtube-dl coding conventions and adjusted the code to meet them
• Covered the code with tests (note that PRs without tests will be REJECTED)
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• Bug fix
• Improvement
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• New feature

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[dirkf]

1. Use the template
2. The SSL processing is somewhat carefully designed to work with the best available options according to the Python implementation in use. Please review the SSL documentation for versions 2.6 up before proposing changes.

[dirkf]

This is an actual bug; thanks for the hint:

Suggested change

	formats.extend([fmt_url, video_id, 'mp4'], m3u8_id='hls', fatal=False)
	formats.extend(self._extract_m3u8_formats(fmt_url, video_id, 'mp4', m3u8_id='hls', fatal=False))