itag 22 is missing in some videos but savefrom.net gives download links for itag 22

[Kumuduweerasinghe]

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This is a vevo video https://www.youtube.com/watch?v=XCQK6LmhYqc. savefrom.net gives itag 22 to download all the time. But when I try to download it from youtube-dl, it only gives me best format 18. Why is that? am I missing some thing.

1. here we don't have itag=22 available
   

2. savefrom.net let us to download itag=22 (They do not convert )
   

3. savefrom.net provided url
   https://r3---sn-8qj-i5ozz.googlevideo.com/videoplayback?source=youtube&mt=1539046187&mv=u&pcm2cms=yes&fvip=3&ms=au%2Crdu&ip=123.30.210.215&lmt=1537538088592722&dur=190.333&itag=22&pl=24&ratebypass=yes&mime=video%2Fmp4&c=WEB&mm=31%2C29&mn=sn-8qj-i5ozz%2Csn-8qj-i5oed&ipbits=0&ei=jf-7W7Bej97hArWajvgL&id=o-AIazzD6oREr6h_LrjRxKK-VUfP47gpSo80hK0qAENNa6&key=yt6&txp=4531332&sparams=dur%2Cei%2Cid%2Cip%2Cipbits%2Citag%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpcm2cms%2Cpl%2Cratebypass%2Crequiressl%2Csource%2Cexpire&requiressl=yes&expire=1539068909&signature=35ED9CB6D3BB39548BE01800C0D50200B6137600.35AEF34B8BDC5A67A554A2772D2E946BDCF5E91F&video_id=XCQK6LmhYqc&title=Rita+Ora+-+Let+You+Love+Me+%5BOfficial+Video%5D

&itag=22&pl=24

Q1. My quetion is 'how savefrom.net does it?'

Q2. Can youtube-dl get itag=22 for this video?

Q3. Where is the code segment does that magic?

[Kumuduweerasinghe]

Someone, please answer this question? how to do this?

[dstftw]

1. Ask them how they do this.
2. 22 is not listed by youtube for this video.
3. See youtube extractor.

[Vangelis66]

... Well, this seems to be a genuine bug in the way yt-dl parses all available itags on VEVO videos - or, perhaps, the youtube API does not properly divulge all itags to yt-dl...

Take, for instance, another VEVO video,

https://www.youtube.com/watch?v=Sc97AUImI04

youtube-dl -F "https://www.youtube.com/watch?v=Sc97AUImI04" | FindStr 720p =>

136          mp4        1280x720   720p 1513k , avc1.4d401f, 24fps, video only, 20.78MiB
247          webm       1280x720   720p 1523k , vp9, 24fps, video only, 24.94MiB

OTOH, and in accordance with OP, with the SaveFrom.net helper userscript installed (Basilisk 52, Violentmonkey v2.9.7) the standalone mp4 720p variant (aka itag=22) is quickly detected and downloadable:

Perhaps itag=22 is still there on yt's CDNs, but no longer advertised to browsers/apps, so it might be that SF.net is force-requesting it? In any case, the URI to the userscript is

https://download.sf-helper.com/chrome/helper.user.js

For good measure, here it is zipped: helper.user.zip

Perhaps, when inspected by the yt-dl devs, it can be figured out

how they do this

So, IMHO, this issue report was prematurely closed...

In practical terms, one can always choose f 136+140 in yt-dl and (with FFmpeg installed) achieve similar results to (now missing) f 22 ...

Kind regards

[Vangelis66]

I wrote:

Perhaps itag=22 is still there on yt's CDNs, but no longer advertised to browsers/apps,
so it might be that SF.net is force-requesting it?

... FWIW, as of around yesterday, Nov 13th 2018, even the latest version (7.94.2) of the SF.net userscript is UNABLE to detect the standalone 720p MP4 encode (itag=22) on VEVO music clips (like the one in my previous comment); it defaults to detecting the standalone 360p MP4 one (itag=18) 😠 ...

Either Youtube have managed to beat SF.net in their game, or they genuinely removed the itag=22 encodes from their servers (?); I lean on believing the first scenario, i.e. they simply successfully blocked every access to them 😞 ... Oh well, it was good for the whole month it lasted....