This video covers the topic of Aids to Navigation (ATONS) that you need to know to pass and exam to get your captain's license. Below are links to the US Captain's Training website where you can purchase course and Diamond Marine Services who provide USCG Application Consulting and Submission to get your captain's license. The best way to get your captain's license is to start with the Application Process and then work your way through a course once you have a good handle on you application packet.
USCG Approved Courses from US Captain's Training
https://uscaptainstraining.com/
USCG Application Consulting and Submission
https://diamondmarineservices.com/web/credentialconsulting/cc-detail