You have two paths.
1, you chose the right time to communicate with the contracted advertising company of this monitor and give money to let the advertising company check and broadcast it for you at the time you chose. The contact number is usually next to the display screen or in the middle of the advertisement.
2. If a company packages the display screen of the time period you need, and you happen to know the person in charge of this matter in this company, it is not a big problem for you to ask him to talk to the advertising company about giving you two minutes for free.