Improve Error Handling within YoutubeUploader

[chand1012]

Description:
Improve error handling within the YouTubeUploader class methods.

Additional context
Here is a list of errors to check for:

• Check to see if video file is under 128GB.
• Check handle both a missing client_secrets.json and no client_secret and client_id input.
• Handle failed uploads.

How to get started:
Write error handling for the above errors.

Acceptance Criteria:
All three of the above errors are handled.