Ошибка в цикле (?)

import urllib.request 
from bs4 import BeautifulSoup 
 
def get_html(url):
    response = urllib.request.urlopen(url)
    return response.read()
 
def parse(html):
 
    soup = BeautifulSoup(html, "html.parser")
    ul = soup.find("ul", {"class": "channels-browse-content-grid branded-page-gutter-padding grid-lockups-container"})
 
    projects = []
 
    for block in ul.find_all('li'):
        rows = block.find_all('div')
 
        cont = soup.find_all("div", {"class": "yt-lockup-content"})
 
        projects.append({
            'name': cont[0].a.text
        })
 
    for project in projects:
        print (project)
 
def main():
    parse(get_html('https://www.youtube.com/user/TEDtalksDirector/videos'))
 
if __name__ == '__main__':
    main()

import urllib.request
from bs4 import BeautifulSoup
 
 
def get_html(url):
    response = urllib.request.urlopen(url)
    return response.read()
 
 
def parse(html):
    soup = BeautifulSoup(html, "html.parser")
    ul = soup.find("ul", {"class": "channels-browse-content-grid branded-page-gutter-padding grid-lockups-container"})
 
    titles = []
 
    for block in ul.find_all('li'):
        cont = block.find_all("a", {"class": "yt-uix-tile-link"})
 
        if cont:
            titles.append({'name': cont[0].text})
 
    for title in titles:
        print(title)
 
 
parse(get_html('https://www.youtube.com/user/TEDtalksDirector/videos'))