The starting cursor, i.e., how many results to skip (for
picking up an old search).
max_pages
results are returned in batches/pages with 100 videos. How
many should be requested before the function stops?
cache
should progress be saved in the current session? It can then be
retrieved with last_query() if an error occurs. But the function
will use extra memory.
verbose
should the function print status updates to the screen?
token
The authentication token (usually supplied automatically after
running auth_research once).