GoogleJsonResponseException: API call to youtube.channels.list failed with error:
The request cannot be completed because you have exceeded your
… indicating that you have reached the usage limit for the YouTube API.
for each A.P.I. comes a different limit of usage, on the case of YouTube API, each user is assigned a set of quota units per day, which can be used to make requests to the A.P.I. and once the usage limit is reached, the API will return this error message.
You can check your current usage limit and usage on the Google Cloud Console.