The maxResults parameter specifies the maximum number of items that
should be returned in the result set. Acceptable values are 0 to 50,
inclusive. The default value is 5.
The pageToken parameter identifies a specific page in the result set
that should be returned. In an API response, the nextPageToken and
prevPageToken properties identify other pages that could be retrieved.
The regionCode parameter instructs the API to return search results for
videos that can be viewed in the specified country. The parameter value is
an ISO 3166-1 alpha-2 country code.