parse Error on ted some links

[design365]

the link is :https://www.ted.com/talks/lina_marieth_hoyos_what_is_the_coldest_thing_in_the_world
and the extractor show error:

ERROR: An extractor error has occurred. (caused by KeyError(u'nativeDownloads',)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type youtube-dl -U to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 503, in extract
ie_result = self._real_extract(url)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/ted.py", line 131, in _real_extract
return self._talk_info(url, name)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/ted.py", line 184, in _talk_info
dict) or talk_info['nativeDownloads']
KeyError: u'nativeDownloads'
Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
ie_result = ie.extract(url)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 516, in extract
raise ExtractorError('An extractor error has occurred.', cause=e)
ExtractorError: An extractor error has occurred. (caused by KeyError(u'nativeDownloads',)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type youtube-dl -U to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

[design365]

thanks for your help, but now ,the parse result is M3U8 format , how can i get mp4 format?

[design365]

@dstftw thanks for your help, but now ,the parse result is M3U8 format , how can i get mp4 format?