Some youtu.be audio and video stream have the same link

[cash168]

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Question

Verbose log

youtube-dl -g 'https://youtu.be/qs-uiRu_cu8' -v
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-g', u'https://youtu.be/qs-uiRu_cu8', u'-v']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2020.07.28
[debug] Python version 2.7.17 (CPython) - Linux-4.15.0-112-generic-x86_64-with-Ubuntu-18.04-bionic
[debug] exe versions: ffmpeg N-98849-g026fea8, ffprobe N-98849-g026fea8, phantomjs ., rtmpdump 2.4
[debug] Proxy map: {}
[debug] Default format spec: bestvideo+bestaudio/best

Output - audio and video stream have the same link. Example:

youtube-dl -g 'https://youtu.be/qs-uiRu_cu8'
https://manifest.googlevideo.com/api/manifest/dash/expire/1598443733/ei/dfxFX5KNF8L07AT-vbrAAQ/ip/89.223.58.12/id/aacfae891bbf72ef/source/youtube/requiressl/yes/playback_host/r16---sn-axq7sn7z.googlevideo.com/mh/nf/mm/31%2C26/mn/sn-axq7sn7z%2Csn-f5f7lnel/ms/au%2Conr/mv/m/mvi/16/nh/IgpwcjAxLmxlZDAzKgkxMjcuMC4wLjE%2C/pl/20/hfr/all/as/fmp4_audio_clear%2Cwebm_audio_clear%2Cwebm2_audio_clear%2Cfmp4_sd_hd_clear%2Cwebm2_sd_hd_clear/initcwndbps/1788750/vprv/1/mt/1598421994/fvip/1/keepalive/yes/itag/0/sparams/expire%2Cei%2Cip%2Cid%2Csource%2Crequiressl%2Chfr%2Cas%2Cvprv%2Citag/sig/AOq0QJ8wRgIhANVPHW5TC99CKjqrRJqhWBMf1YwYMoRdlOFVM4_BW8YXAiEAnnz_KjfNXxIw5hWa1FFHWGo0qXXTZrL3u6Sxo2Fkrm4%3D/lsparams/playback_host%2Cmh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cnh%2Cpl%2Cinitcwndbps/lsig/AG3C_xAwRgIhAI8Qh8Hnkh90b6lm2Z2XIM25FXvnnWr9pMBo6Ne5ti6PAiEA12RIq1_aTVebOOkBWV3S1bNfLaxpDP3ORQ1N-XT_6y8%3D
https://manifest.googlevideo.com/api/manifest/dash/expire/1598443733/ei/dfxFX5KNF8L07AT-vbrAAQ/ip/89.223.58.12/id/aacfae891bbf72ef/source/youtube/requiressl/yes/playback_host/r16---sn-axq7sn7z.googlevideo.com/mh/nf/mm/31%2C26/mn/sn-axq7sn7z%2Csn-f5f7lnel/ms/au%2Conr/mv/m/mvi/16/nh/IgpwcjAxLmxlZDAzKgkxMjcuMC4wLjE%2C/pl/20/hfr/all/as/fmp4_audio_clear%2Cwebm_audio_clear%2Cwebm2_audio_clear%2Cfmp4_sd_hd_clear%2Cwebm2_sd_hd_clear/initcwndbps/1788750/vprv/1/mt/1598421994/fvip/1/keepalive/yes/itag/0/sparams/expire%2Cei%2Cip%2Cid%2Csource%2Crequiressl%2Chfr%2Cas%2Cvprv%2Citag/sig/AOq0QJ8wRgIhANVPHW5TC99CKjqrRJqhWBMf1YwYMoRdlOFVM4_BW8YXAiEAnnz_KjfNXxIw5hWa1FFHWGo0qXXTZrL3u6Sxo2Fkrm4%3D/lsparams/playback_host%2Cmh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cnh%2Cpl%2Cinitcwndbps/lsig/AG3C_xAwRgIhAI8Qh8Hnkh90b6lm2Z2XIM25FXvnnWr9pMBo6Ne5ti6PAiEA12RIq1_aTVebOOkBWV3S1bNfLaxpDP3ORQ1N-XT_6y8%3D

But on the rest of the videos, the links are different.

Example:

youtube-dl -g 'https://youtu.be/VyrN9AJm7sk'
https://r5---sn-axq7sn7z.googlevideo.com/videoplayback?expire=1598444021&ei=lP1FX9r9NZiiyQWTs7noBA&ip=89.223.58.12&id=o-ACxUZkSmkVsuJH-JpHGcRh8pwTMU2nbJUypQWSXlHk4K&itag=137&aitags=133%2C134%2C135%2C136%2C137%2C160%2C242%2C243%2C244%2C247%2C248%2C278%2C394%2C395%2C396%2C397%2C398%2C399&source=youtube&requiressl=yes&mh=mf&mm=31%2C26&mn=sn-axq7sn7z%2Csn-f5f7lne6&ms=au%2Conr&mv=m&mvi=5&nh=IgpwcjAxLmxlZDAzKgkxMjcuMC4wLjE%2C&pl=20&initcwndbps=1746250&vprv=1&mime=video%2Fmp4&gir=yes&clen=416647749&dur=1737.268&lmt=1566852332717189&mt=1598422234&fvip=5&keepalive=yes&beids=9466587&c=WEB&txp=4535432&sparams=expire%2Cei%2Cip%2Cid%2Caitags%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cgir%2Cclen%2Cdur%2Clmt&sig=AOq0QJ8wRQIgfBgV5PNFt5Aej4B3-pINc21Jrepw-TNV9kX5HMvf-5UCIQDGrsLXlfoRyNyEwscD65Ze4RFiYT6TtZOYZhAxOPc3pg%3D%3D&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cnh%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRQIhANIlIg8TvuPL5QXhPB93BxB-oizQafF_qGNaI2YPGPU8AiAIh5TUdAE9bAypZs0Ixm-rWOUyMzhE3IyaHU5lSeC7Kg%3D%3D&ratebypass=yes                                                                                       
https://r5---sn-axq7sn7z.googlevideo.com/videoplayback?expire=1598444021&ei=lP1FX9r9NZiiyQWTs7noBA&ip=89.223.58.12&id=o-ACxUZkSmkVsuJH-JpHGcRh8pwTMU2nbJUypQWSXlHk4K&itag=251&source=youtube&requiressl=yes&mh=mf&mm=31%2C26&mn=sn-axq7sn7z%2Csn-f5f7lne6&ms=au%2Conr&mv=m&mvi=5&nh=IgpwcjAxLmxlZDAzKgkxMjcuMC4wLjE%2C&pl=20&initcwndbps=1746250&vprv=1&mime=audio%2Fwebm&gir=yes&clen=32756122&dur=1737.281&lmt=1566842440093860&mt=1598422234&fvip=5&keepalive=yes&beids=9466587&c=WEB&txp=4511222&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cgir%2Cclen%2Cdur%2Clmt&sig=AOq0QJ8wRQIgAwiGxezqPZxP9sIXCT-R0fvf7ZT4sJWxJR4jBy5W5gUCIQCmaYNHaTPcI0wjlP9I9t34ZjTbrGkJtLuKOC02GCDbSw%3D%3D&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cnh%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRQIhANIlIg8TvuPL5QXhPB93BxB-oizQafF_qGNaI2YPGPU8AiAIh5TUdAE9bAypZs0Ixm-rWOUyMzhE3IyaHU5lSeC7Kg%3D%3D&ratebypass=yes

Additional examples of videos with the same links to media streams:

https://youtu.be/0YgF4ToXPcE
https://youtu.be/up0ffjBA3dQ

[cash168]

got it
the links are the same since it's DASH