getVideoLinkFromChannels.py

import urllib.request
import json
import math
import sys

#Get list of videos from Youtube channel
def getVideos(maxResults, uploadId, key,nextPageToken, videosOutput):
    videos = []
    urld = searchURL+"/playlistItems?part=snippet%2CcontentDetails&maxResults="+maxResults+"&playlistId="+uploadId+"&key="+key+"&pageToken="+nextPageToken   
    with urllib.request.urlopen(urld) as url:
        datad = json.loads(url.read())
    totalResults = datad['pageInfo']['totalResults']

    for data in datad['items']:
        ntitle =  data['snippet']['title']
        nlink = data['contentDetails']['videoId']
        videosOutput.append([nlink,ntitle])
    if 'nextPageToken' in datad:
       nextPageToken = datad['nextPageToken']
       #recursive call     
       getVideos(maxResults, uploadId, key, nextPageToken, videosOutput)

#API KEY
key = "API_KEY"
videoURL = "http://www.youtube.com/watch?v="
searchURL = "https://www.googleapis.com/youtube/v3"
maxResults= "50"
nextPageToken = ""

ytids = []
with open(sys.argv[1]) as file:
      ytids = file.read().splitlines() 
file.close()     
videos = []
#print(ytids)
for ytid in ytids:
    urld = searchURL+"/channels?part=contentDetails&id="+ytid+"&key="+key   
    with urllib.request.urlopen(urld) as url:
        datad = json.loads(url.read())
    uploadsdet = datad['items']
    uploadId = uploadsdet[0]['contentDetails']['relatedPlaylists']['uploads']
    getVideos(maxResults, uploadId, key,nextPageToken, videos)
for link,title in videos:
    print(videoURL+link)