urllib.error.HTTPError: HTTP Error 404: Not Found

[snippsat]

Drop all other modules and use only Requests as you have in import.
Call in line 15 is wrong snippet,id&order can not have ,.
Example getting subscribers count for a YouTube channel.

import requests

api_key = 'xxxxxxxxxxxxxxxxx'
channel_id = 'UC5kS0l76kC0xOzMPtOmSFGw'
response = requests.get(f'https://www.googleapis.com/youtube/v3/channels?part=statistics&id={channel_id}&key={api_key}')

Test usage:

>>> response
<Response [200]>
>>> j = response.json()
>>> j['items'][0]['statistics']['subscriberCount']
'273000'

Possible fix for your call.

import requests

api_key = 'xxxxxxxxxxxxxxxx'
channel_id = 'UC5kS0l76kC0xOzMPtOmSFGw'
response = requests.get(f'https://www.googleapis.com/youtube/v3/channels?part=snippet&order=date&maxResults=1&id={channel_id}&key={api_key}')
json_data = response.json()
# Do call on returned json_data