Strip/disregard unneeded information from full YouTube URLs

[Kaos-Industries]

Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2019.01.16. If it's not, read this FAQ entry and update. Issues with outdated version will be rejected.

• I've verified and I assure that I'm running youtube-dl 2019.01.16

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• At least skimmed through the README, most notably the FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones
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• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
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---

Whenever adding a full YouTube URL that ends like so:

&t=0s&list=PLR3nWwHlZ9WBpi3uWsjSe6r1PiA8MTbnE&index=

...those parameters and some extra (the three weird numbers in the beginning of the bash screenshot below) will leak through to STDOUT in the form of either unseemly output or plain errors.

bash:

CMD.exe:

These aren't fatal and the commands do complete successfully - although in the case of bash, note how I had to press Ctrl+C in order to release the prompt, which I would argue counts as broken functionality. Without pressing Ctrl+C, the output simply hangs at the $, which at first gave me the impression something was still happening.

I know these parameters aren't needed for a straight, non-playlist video download such as I'm demonstrating above - maybe those kinds of downloads make up most of the downloads that youtube-dl is used for? - and considering how often I tend to copy the whole YT URL out of convenience when grabbing a video, it would be nice to have these apparent "errors" be waved away intelligently by the program, especially when it's clear from the debugging information below that youtube-dl already knows how to extract the parts of the URL that are important. It would also result in a much more beginner-friendly UX, as I imagine most new youtube-dl users are pasting full YouTube URLs in by default and being confused by the output.

Here is the result of the command with -v:

User@Prometheus ~
$ youtube-dl -v https://www.youtube.com/watch?v=0sB3Fjw3Uvc&t=0s&list=PLR3nWwHlZ9WBpi3uWsjSe6r1PiA8MTbnE&index=
[1] 10824
[2] 10904
[3] 9080
[2]   Done                    t=0s
[3]   Done                    list=PLR3nWwHlZ9WBpi3uWsjSe6r1PiA8MTbnE

User@Prometheus ~
$ [debug] System config: [u'-o', u'B:/Users/User/Desktop/youtube-dl Output/%(title)s.%(ext)s']
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v', u'https://www.youtube.com/watch?v=0sB3Fjw3Uvc']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2019.01.16
[debug] Python version 2.7.14 (CPython) - CYGWIN_NT-6.1-2.11.2-0.329-5-3-x86_64-64bit
[debug] exe versions: ffmpeg N-92966-gd52a1be4e3, ffprobe N-92966-gd52a1be4e3
[debug] Proxy map: {}
[youtube] 0sB3Fjw3Uvc: Downloading webpage
[youtube] 0sB3Fjw3Uvc: Downloading video info webpage
[youtube] {18} signature length 41.40, html5 player vflzJWmZN
[youtube] {36} signature length 41.40, html5 player vflzJWmZN
[youtube] {17} signature length 41.40, html5 player vflzJWmZN
[youtube] {134} signature length 41.40, html5 player vflzJWmZN
[youtube] {243} signature length 41.40, html5 player vflzJWmZN
[youtube] {396} signature length 41.40, html5 player vflzJWmZN
[youtube] {133} signature length 41.40, html5 player vflzJWmZN
[youtube] {242} signature length 41.40, html5 player vflzJWmZN
[youtube] {395} signature length 41.40, html5 player vflzJWmZN
[youtube] {160} signature length 41.40, html5 player vflzJWmZN
[youtube] {278} signature length 41.40, html5 player vflzJWmZN
[youtube] {394} signature length 41.40, html5 player vflzJWmZN
[youtube] {140} signature length 41.40, html5 player vflzJWmZN
[youtube] {171} signature length 41.40, html5 player vflzJWmZN
[youtube] {249} signature length 41.40, html5 player vflzJWmZN
[youtube] {250} signature length 41.40, html5 player vflzJWmZN
[youtube] {251} signature length 41.40, html5 player vflzJWmZN
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[debug] Invoking downloader on u'https://r5---sn-cu-auos.googlevideo.com/videoplayback?ip=150.143.245.196&clen=14286246&dur=258.466&mv=m&id=o-AA9vEAdKOmgWD5kdwllyuClRn1WyJsNgyWkWnDDjeuDY&ms=au%2Conr&c=WEB&mn=sn-cu-auos%2Csn-5hnekn7s&mm=31%2C26&ipbits=0&gir=yes&initcwndbps=1282500&requiressl=yes&gcr=gb&lmt=1540493085128654&keepalive=yes&mt=1547617065&pl=25&mime=video%2Fmp4&expire=1547638766&source=youtube&key=yt6&txp=5532432&sparams=aitags%2Cclen%2Cdur%2Cei%2Cgcr%2Cgir%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Ckeepalive%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Crequiressl%2Csource%2Cexpire&itag=134&ei=jsM-XODxJcqPV4eJhMAE&aitags=133%2C134%2C160%2C242%2C243%2C278%2C394%2C395%2C396&fvip=5&signature=25C02454530142244FC1CB374CE8923B205C9CC1.2305AC057257887782C2F5A8EFFE42C0067682C8&ratebypass=yes'
[download] Destination: B:/Users/User/Desktop/youtube-dl Output/The Animals - The House of the Rising Sun Mafia III Trailer 3 Casino Battlefield V !!!.f134.mp4
[download] 100% of 13.62MiB in 00:03
[debug] Invoking downloader on u'https://r5---sn-cu-auos.googlevideo.com/videoplayback?ip=150.143.245.196&clen=3650817&dur=258.541&mv=m&id=o-AA9vEAdKOmgWD5kdwllyuClRn1WyJsNgyWkWnDDjeuDY&ms=au%2Conr&c=WEB&mn=sn-cu-auos%2Csn-5hnekn7s&mm=31%2C26&ipbits=0&gir=yes&initcwndbps=1282500&requiressl=yes&gcr=gb&lmt=1540500628840883&keepalive=yes&mt=1547617065&pl=25&mime=audio%2Fwebm&expire=1547638766&source=youtube&key=yt6&txp=5511222&sparams=clen%2Cdur%2Cei%2Cgcr%2Cgir%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Ckeepalive%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Crequiressl%2Csource%2Cexpire&itag=251&ei=jsM-XODxJcqPV4eJhMAE&fvip=5&signature=9E079CBEFF5DCFAD429C8D9B0100696420B1A89D.242138B8DB2DE2EDF2E804A79745779D6FA7AA71&ratebypass=yes'
[download] Destination: B:/Users/User/Desktop/youtube-dl Output/The Animals - The House of the Rising Sun Mafia III Trailer 3 Casino Battlefield V !!!.f251.webm
[download] 100% of 3.48MiB in 00:00
[ffmpeg] Merging formats into "B:/Users/User/Desktop/youtube-dl Output/The Animals - The House of the Rising Sun Mafia III Trailer 3 Casino Battlefield V !!!.mkv"
[debug] ffmpeg command line: ffmpeg -y -i 'file:B:/Users/User/Desktop/youtube-dl Output/The Animals - The House of the Rising Sun Mafia III Trailer 3 Casino Battlefield V !!!.f134.mp4' -i 'file:B:/Users/User/Desktop/youtube-dl Output/The Animals - The House of the Rising Sun Mafia III Trailer 3 Casino Battlefield V !!!.f251.webm' -c copy -map '0:v:0' -map '1:a:0' 'file:B:/Users/User/Desktop/youtube-dl Output/The Animals - The House of the Rising Sun Mafia III Trailer 3 Casino Battlefield V !!!.temp.mkv'
Deleting original file B:/Users/User/Desktop/youtube-dl Output/The Animals - The House of the Rising Sun Mafia III Trailer 3 Casino Battlefield V !!!.f134.mp4 (pass -k to keep)
Deleting original file B:/Users/User/Desktop/youtube-dl Output/The Animals - The House of the Rising Sun Mafia III Trailer 3 Casino Battlefield V !!!.f251.webm (pass -k to keep)
^C
[1]+  Done                    youtube-dl -v https://www.youtube.com/watch?v=0sB3Fjw3Uvc

[dstftw]

https://github.com/rg3/youtube-dl#video-url-contains-an-ampersand-and-im-getting-some-strange-output-1-2839-or-v-is-not-recognized-as-an-internal-or-external-command