To create an event, to upload a video, or to sell tickets to events you have to create a service item, which will include all the details about what you are publishing, except for date and time when it should be published / streamed live. That will be done in the next step.
Fill in the name of your live stream event / video / real event and description. Choose the category and click on Plan type: Units
Go to next step to add images
Main service image: Use the best photo that describes your event.
Other service image: another high quality pictures.
Image should be in ratio 16:9.
Last step will be to set up performance date and time.