Why does an error appear, are supernatural forces involved in this?

Question

YouTube

import requests, json
key = ""
req = json.loads(requests.get("https://www.googleapis.com/youtube/v3/search?key=%sU&channelId=UCgxTPTFbIbCWfTR9I2-5SeQ&part=snippet,id&order=date&maxResults=50" % key).text)
for i in req['items']:
   print "videoId: ", i['id']['videoId']

Why am I getting an error :(?:

Traceback (most recent call last):
  File "/Users/seal/PycharmProjects/Randomtube/app.py", line 5, in <module>
videoId:  3D6m4WFBt5A
    print "videoId: ", i['id']['videoId']
videoId:  yO1A6Y5acpY
KeyError: 'videoId'
videoId:  v3nvOKDwgvg
videoId:  YKTBY35152w
videoId:  Hf7IqZ_KF7w
videoId:  e1Rf2zobcaw
videoId:  OyV9W_IXatE
videoId:  Yasjlu1iTT0
videoId:  xyYZlR_Ibmc
videoId:  jI8_ddgB_aQ
videoId:  52SW1YfqWio
videoId:  lN_zQRh4WZ4
videoId:  kAMB14V7iT8
videoId:  w-ZF78sczFg
videoId:  ISmCwHXfqFs
videoId:  fWlbTggRKqU
videoId:  jBYFIQ1rx-M
videoId:  lgW5yc9NxQA
videoId:  eYRsmBJJhis
videoId:  dhIfakVqX9A
videoId:  rnl5O2BLilc
videoId:  FsbMDpTQupE
videoId: 

Process finished with exit code 1

Shit like this pops up randomly!

Traceback (most recent call last):
  File "/Users/seal/PycharmProjects/Randomtube/app.py", line 5, in <module>

Answer 1

In such cases it is difficult to say something meaningful.
Well, it's written in red and white: It's obvious that there is no 'videoId' in this element. Check for availability.