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Support Twitter Spaces streams

See original GitHub issue

Checklist

I’m reporting a site feature request
I’ve verified that I’m running youtube-dl version 2021.05.16
I’ve searched the bugtracker for similar site feature requests including closed ones

Description

An example tweet with a Spaces link: https://twitter.com/akirosenthal/status/1397936847741800454

youtube-dl output:

$ youtube-dl https://twitter.com/akirosenthal/status/1397936847741800454
[twitter] 1397936847741800454: Downloading guest token
[twitter] 1397936847741800454: Downloading JSON metadata
[generic] 1yNGaWpbVQQxj: Requesting header
WARNING: Falling back on generic information extractor.
[generic] 1yNGaWpbVQQxj: Downloading webpage
[generic] 1yNGaWpbVQQxj: Extracting information
ERROR: Unsupported URL: https://twitter.com/i/spaces/1yNGaWpbVQQxj

Looking at the network tab in Chrome’s developer tools, it seems like the site’s making connections to pscp.tv, so possibly the already existing Periscope extractor could be used as a base to support Spaces URLs. An example playlist URL:

https://prod-fastly-ap-northeast-1.video.pscp.tv/Transcoding/v1/hls/E2iot0n3CMPrkdBrsf2mBZdvoZb6mvaVHlKLy8Kriww5Mi_ItgaIB4UdvCg0CtyapoSTlbhm9sfSfyKxQ1d16A/non_transcode/ap-northeast-1/periscope-replay-direct-prod-ap-northeast-1-public/audio-space/dynamic_playlist.m3u8?type=live

Example playlist content:

#EXTM3U
#EXT-X-VERSION:6
#EXT-X-TARGETDURATION:4
#EXT-X-INDEPENDENT-SEGMENTS
#EXT-X-MEDIA-SEQUENCE:501
#EXT-X-DISCONTINUITY-SEQUENCE:0
#EXT-X-START:TIME-OFFSET=0.01
#EXT-X-PROGRAM-DATE-TIME:2021-05-27T15:43:10.989Z
#EXTINF:2.986,
chunk_1622130185269794294_501_a.aac?type=live
#EXT-X-PROGRAM-DATE-TIME:2021-05-27T15:43:14.008Z
#EXTINF:3.030,
chunk_1622130188372878103_502_a.aac?type=live
#EXT-X-PROGRAM-DATE-TIME:2021-05-27T15:43:17.053Z
#EXTINF:3.093,
chunk_1622130191393163530_503_a.aac?type=live
#EXT-X-PROGRAM-DATE-TIME:2021-05-27T15:43:20.084Z
#EXTINF:3.008,
chunk_1622130194383671872_504_a.aac?type=live

The last chunk in that playlist would refer to this URL:

https://prod-fastly-ap-northeast-1.video.pscp.tv/Transcoding/v1/hls/E2iot0n3CMPrkdBrsf2mBZdvoZb6mvaVHlKLy8Kriww5Mi_ItgaIB4UdvCg0CtyapoSTlbhm9sfSfyKxQ1d16A/non_transcode/ap-northeast-1/periscope-replay-direct-prod-ap-northeast-1-public/audio-space/chunk_1622130194383671872_504_a.aac?type=live