Download Youtube Live streamed video from the start or selected time

Youtube_Livestream_Parts_download.py

#With the help of this script you can download parts from the Youtube Video that is live streamed, from start of the stream till the end

import urllib.request
import os

#E.G: "https://r4---sn-gqn-p5ns.googlevideo.com/videoplayback?expire=1603041842& ..... 2.20201016.02.00&sq="
#The sound link should contain: &mime=audio in it.
#Here's an example from NASA LIVE:
#VIDEO: https://r5---sn-gqn-p5ns.googlevideo.com/videoplayback?expire=1603165657&ei=eQmOX8TeFtS07gO1xLWwDA&ip=79.115.11.159&id=DDU-rZs-Ic4.1&itag=137&aitags=133%2C134%2C135%2C136%2C137%2C160&source=yt_live_broadcast&requiressl=yes&mh=PU&mm=44%2C29&mn=sn-gqn-p5ns%2Csn-c0q7lnsl&ms=lva%2Crdu&mv=m&mvi=5&pl=20&initcwndbps=1350000&vprv=1&live=1&hang=1&noclen=1&mime=video%2Fmp4&gir=yes&mt=1603143920&fvip=5&keepalive=yes&fexp=23915654&c=WEB&sparams=expire%2Cei%2Cip%2Cid%2Caitags%2Csource%2Crequiressl%2Cvprv%2Clive%2Chang%2Cnoclen%2Cmime%2Cgir&sig=AOq0QJ8wRQIgQMnxy1Yk3HLTpqbOGmjZYH1CXCTNx6u6PgngAVGi4EQCIQDWyaye-u_KGyVQ0HRUsyKVaAzyXbmzDqOGVGpIyP7VtA%3D%3D&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRAIgR5QVZh23NcLE2nRpo5IT-axGEfUCJrXKMmJHjXQdkCYCIFLsIFacvPpy98zaNSB0RfXswacyc-Ru3sYeEjTFym43&alr=yes&cpn=LlPCcTsE_3Xao9Xh&cver=2.20201016.02.00&sq=2504043&rn=13&rbuf=21958
#AUDIO: https://r5---sn-gqn-p5ns.googlevideo.com/videoplayback?expire=1603165657&ei=eQmOX8TeFtS07gO1xLWwDA&ip=79.115.11.159&id=DDU-rZs-Ic4.1&itag=140&source=yt_live_broadcast&requiressl=yes&mh=PU&mm=44%2C29&mn=sn-gqn-p5ns%2Csn-c0q7lnsl&ms=lva%2Crdu&mv=m&mvi=5&pl=20&initcwndbps=1350000&vprv=1&live=1&hang=1&noclen=1&mime=audio%2Fmp4&gir=yes&mt=1603143920&fvip=5&keepalive=yes&fexp=23915654&c=WEB&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cvprv%2Clive%2Chang%2Cnoclen%2Cmime%2Cgir&sig=AOq0QJ8wRAIgWFTZLV1G33cKJoitlK7dUgNg1KuXyvC6F9F7Lc6x3gcCIHaGjehjvVAjUd6cqMnTLtBq9pPRfQWXM3bwI1qQYqpx&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRAIgR5QVZh23NcLE2nRpo5IT-axGEfUCJrXKMmJHjXQdkCYCIFLsIFacvPpy98zaNSB0RfXswacyc-Ru3sYeEjTFym43&alr=yes&cpn=LlPCcTsE_3Xao9Xh&cver=2.20201016.02.00&sq=2504045&rn=20&rbuf=17971
#Use VLC to play the parts. ffmpeg to re-encode / re-mux and then concatenate.

vid_link = "VIDEO LINK THE END -> &sq="
sound_link = "AUDIO LINK THE END -> &sq= "

#Each part should be equivalent to 5 seconds of video
#Please note if what you got on the your link from the sq parameter looks like this &sq=2504043 don't expect
#the script to work with 1, 2504043, because the first part probably already expired.
#Try to download apropiate parts number, like range(2501043, 2504043).

#TO JOIN PARTS with ffmpeg, check this comment
#https://gist.github.com/cheadrian/b661fb68a6a87ea64069e641cef68c3e#gistcomment-3495351

os.mkdir("vid", 0o666) 
os.mkdir("aud", 0o666) 

for i in range(1, 5000): #Change 5000 according to video lenght and 1 to where you want to start
    vide_dow = vid_link + str(i)
    sound_dow = sound_link + str(i) 
    
    name_vid = "vid/" + str(i)  + ".mp4"
    name_sound = "aud/" + str(i)  + ".m4a"
    
    urllib.request.urlretrieve(vide_dow, name_vid) 
    urllib.request.urlretrieve(sound_dow, name_sound) 
    
    print("Downloaded part ", i)

it doesn't work for me. neither vlc player nor gomplayer is able to play output file. vlc player reports 2400 hours video but its only 2 hours and 40 minutes.

I observed this problem too before, as I mentioned in a previous message. Not sure why it wouldn't work for you. Report issues related to the program you used in the proper issue tracker, and don't forget to include details.