Explain youtube URL direct download link sections

[Waffa]

Greetings fellow members, can You break it down to me, all the parameters of these Youtube direct download links,
and help to combine direct links that are not time expired (these work for few days, the Goo.gl link is direct download working url).

One wish is to get URLs work, but also want to know the reasons and meaning of (why) all the these parameters are on different videos, where they come from.

Links are made with same Yt downloader, just with a month a part. Many parts can be removed from URL, but what and why.

If you know better forum to also post that link (more related to webtec perhaps, let me know)

Update: Now only the first URL works, others stopped download after few clicks. Other times they worked for many clicks for days, posted old links also to compare, that i used before Hilighted the similar parts, for more easy viewing.

fresh: https://goo.gl/wvxsCo (Updated: https://goo.gl/Z4ZkhX)
https://r18---sn-i5h7ln7s.googlevideo.com/videoplayback?itag=18&requiressl=yes&ipbits=0&initcwndbps=982500&pl=23&fexp=930827,9407 141,9407535,9407713,9408142,9408420,9408710,940917 0,9410773,9412958,9413503,9415304,9416126,9416329, 9416456,952640&key=yt5&upn=glRoyFGA0ec&ratebypass= yes&mm=31&lmt=1411065252274357&expire=1435166991&m n=sn-i5h7ln7s&mt=1435145272&mv=m&ms=au&ip=217.71.46.107 &source=youtube&sver=3&mime=video/mp4&signature=B31CDB6BF6F394517625654F83D226EE41CB AE0D.1F181620CB4BDE450187E89F5F18E5546FA7EC9B&dur= 1153.102&id=o-AOYJ9JCS9QUyLk_9mGm6PSqiCis8R3J21PutrGKSWNK4&sparams=dur,id,initcwndbps,ip,ipbits,itag,lmt,mime,mm,mn,ms,mv,pl,ratebypass,requiressl,source,u pn,expire&title=Seenekas%20Allarile%20Nature%20and%20Life,%2 0Open%20Source%20Human%20clips

expired:
https://r2---sn-4g57kuek.googlevideo.com/videoplayback?sver=3&upn=16Q_Tcw2nVI&requiressl=yes&dur=1153.102&ip=217.71.47.125&id=o-AACaLIY74_LyanCZexuZDKDXDZkFiNYojferc3m14alK&ipbit s=0&fexp=916723,930827,9406989,9408142,9408710,941 3503,9415304,952612,957904&itag=18&sparams=dur,expire,id,initcwndbps,ip,ipbits,itag,mime,mm,mn,ms,mv,pl,ratebypass,requiressl,source, upn&ratebypass=yes&signature=35214992C3EF424735A867CD 86E388D686FAF8C2.22EE9551CDC0C315E4C18BDF02562A66C D631798&source=youtube&mime=video/mp4&pl=23&key=cms1&expire=1433031302&title=Seenekas%20Allarile%20Nature%20and%20Life,%2 0Open%20Source%20Human%20clips&redirect_counter=1&req_id=dd03f9f1f56ba3ee&cms_red irect=yes&mm=26&mn=sn-4g57kuek&ms=tsu&mt=1433009716&mv=m



FresH: https://goo.gl/jwlMx3 (updated: https://goo.gl/O3Tv0R)
https://r19---sn-i5h7ln7d.googlevideo.com/videoplayback?ms=au&fexp=930827,9407141,9407535,9407713,9408142, 9408420,9408710,9409170,9410773,9412958,9413503,94 15304,9416126,9416329,9416456,952640&mv=m&mt=14351 45537&dur=5375.535&ratebypass=yes&upn=zmENgUbJFsM& mn=sn-i5h7ln7d&mm=31&source=youtube&signature=DC335A3BCD CDC3AC0673ABCF111D3AE3E17EDF85.719FBBA50A9A0D980E2 0B24582777F1760CA4536&lmt=1401350890138699&ipbits= 0&key=yt5&itag=18&mime=video/mp4&requiressl=yes&pl=23&expire=1435167205&initcwndbps=963750&sparams=dur,id,initcwndbps,ip,ipbits,itag,lmt,mime ,mm,mn,ms,mv,pl,ratebypass,requiressl,source,upn,expire&sver=3&id=o-AE3JTdNMgjXdXBspr5-B_sWgaA_mx9IUeS2KMGfQYtej&ip=217.71.46.107&title=J%C3%BCri%20Rumm%20m_f%201994,%20lavastaja%2 0Jaan%20Kolberg

expired:
https://r19---sn-i5h7ln7d.googlevideo.com/videoplayback?ipbits=0&sparams=dur,id,initcwndbps,ip,ipbits,itag,mime,mm,ms,mv,pl,ratebypass,requiressl,source,upn,expire&signature=29B03761AB63074A4B92264A8C565A91061CDCEE .121861B3F67F510CDDABA694ADDEB04BA8312092&upn=BBRR BR8DUhg&pl=23&itag=18&mime=video/mp4&fexp=916723,930827,9407535,9407713,9407898,940 8084,9408142,9408710,9409170,9410773,9412958,94135 03,9415304,9415351,948124,952612&mm=31&ratebypass= yes&requiressl=yes&ms=au&mt=1432586661&mv=m&dur=5375.535&expire=1432608388&key=yt5&ip=217.71.46.183&sver=3&id=o-AC19SOjaMoHHf8LLdsU6kzwR9lfDHpP7cf3gjz9lZjVS&sourc e=youtube&initcwndbps=1047500&title=J%C3%BCri%20Rumm%20m_f%201994,%20lavastaja% 20Jaan%20Kolberg




fresh: https://www.goo.gl/Z3mD4v (Updated: https://goo.gl/k0VYtG )
https://r7---sn-4g57kues.googlevideo.com/videoplayback?sparams=dur,expire,gcr,id,initcwndbps,ip,ipbits,ita g,lmt,mime,mm,mn,ms,mv,pl,ratebypass,requiressl,source,u pn&sver=3&requiressl=yes&key=cms1&upn=0Bg09fb-h4s&lmt=1390119880708306&expire=1435167761&itag=18 &ipbits=0&ip=217.71.46.107&mime=video/mp4&signature=063EF2373575816A1736ADA1C68033FA14DB 2364.142C159C73F3A17B870B66BCC15BF72D1A296068&sour ce=youtube&id=o-AOooJLEwCPeHvWrClwtiRtphW1TFGOYwcIC7c1x16--4&pl=23&dur=6629.854&fexp=930827,9407141,9407535,9 407713,9408142,9408420,9408710,9409170,9410773,941 2958,9413503,9415304,9416126,9416329,9416456,95264 0&ratebypass=yes&gcr=ee&title=Nineteen%20Eighty-Four%201984%20to%20Richard%20Burton,%20George%20Or well&redirect_counter=1&req_id=cad6a9d94864a3ee&cms_redirect=yes&mm=26&mn=sn-4g57kues&ms=tsu&mt=1435146142&mv=m

expired:
https://r7---sn-4g57kues.googlevideo.com/videoplayback?itag=18&source=youtube&mime=video/mp4&ip=217.71.47.172&pl=23&signature=427A48DC32453 1218760E0AE90BA39F7D506B8F0.1D0E64D4356F8934ADBFF0 D92AFAF9DE55619A9C&expire=1432604651&ipbits=0&requ iressl=yes&sparams=dur,expire,gcr,id,initcwndbps,ip,ipbits,it ag,mime,mm,mn,ms,mv,pl,ratebypass,requiressl,source,up n&gcr=ee&upn=coIN2XQ3qfI&id=o-AECTd0Mug2nMnRyB9wMqN0f265QFtZ-Y5RKuP1TeZlw-&key=cms1&dur=6629.854&sver=3&fexp=916723,930827,9 407535,9407713,9407898,9408084,9408142,9408710,940 9170,9410773,9412958,9413503,9415304,9415351,94812 4,952612&ratebypass=yes&title=Nineteen%20Eighty-Four%201984%20to%20Richard%20Burton,%20George%20Or well&redirect_counter=1&req_id=e4bc918b8725a3ee&cms_redirect=yes&mm=26&mn=sn-4g57kues&ms=tsu&mt=1432583127&mv=m

What is the logic, that sometimes there is one options,another tiems so much different.
It has downloader IP in but it workd from other IPs also, with no cookies, tested.

Also solves one other user problem perhaps: https://forum.videohelp.com/threads/372522-Video-Streaming-with-download-button

[Waffa]

The idea, is later to make a script, that generates these links in web directly, as there is these already but would just want to know thes parameter meanings.
That will be lenghty am know.

Add to the answer as noob meta info as You can, so that i can share it around in places, will contribute Your names as well for sure.

[aazerty]

Hi ,

expire=1435167205

Number in seconds from the 1st of january 1970

cheers .

[biezom]

Hi ,

expire=1435167205

Number in seconds from the 1st of january 1970

cheers .

http://www.epochconverter.com/

or php script

<?php
echo date('m/d/Y H:i:s', 1435167205);
?>

[aazerty]

Hi biezom ,

Many thanks for those instructions .

Winter time (France)

<?php
date_default_timezone_set('Europe/Paris');
echo date('m/d/Y H:i:s', 1435167205);
?>

Summer time (France)

<?php
date_default_timezone_set('Europe/Rome');
echo date('m/d/Y H:i:s', 1435167205);
?>

Cheers .