Unlike all your YouTube videos via YouTube Data API v3

unlike your youtube videos.py

import os
import time

import google_auth_oauthlib.flow
import googleapiclient.discovery
import googleapiclient.errors

scopes = ["https://www.googleapis.com/auth/youtube.force-ssl"]

def main():
    # Disable OAuthlib's HTTPS verification when running locally.
    # *DO NOT* leave this option enabled in production.
    os.environ["OAUTHLIB_INSECURE_TRANSPORT"] = "1"

    api_service_name = "youtube"
    api_version = "v3"
    client_secrets_file = "client_secret.com.json" # get this file from your google console

    # Get credentials and create an API client
    flow = google_auth_oauthlib.flow.InstalledAppFlow.from_client_secrets_file(
        client_secrets_file, scopes)
    credentials = flow.run_console()
    youtube = googleapiclient.discovery.build(
        api_service_name, api_version, credentials=credentials)
    
    totalResult = 10 # any integer than 1, needed only for first run
    nextPageToken = ''

    while totalResult > 0:
        likedVideoList = youtube.videos().list(
            part="id",
            myRating="like",
            maxResults=50,
            pageToken=nextPageToken
        )
        likedResponse = likedVideoList.execute()

        print('list of next batch response')
        print('Looping items begins')
        for item in likedResponse['items']:
            request = youtube.videos().rate(
                id=item['id'],
                rating='none'
            )
            try:    
                request.execute()
                print('Video unliked', item['id'])
            except:
                print('For whatever reason,', item['id'], 'unliking did not happen')
                print('Going to next')
                
            time.sleep(0.2)
        
        totalResult = likedResponse['pageInfo']['totalResults']
        nextPageToken = likedResponse['nextPageToken']
        print('Videos left', totalResult)


if __name__ == "__main__":
    main()