Classes are basically buckets to hold media for students to view and interact with. Each class can hold one piece of media and one presentation.
If there is a slot available to add media, you will see a blue plus icon for the class in the class list. Click the plus icon to add media to the class.
Class recordings typically occupy the media slot and are usually published to their classes as soon as they are finished and processed. If the media icon is light-gray, this is a "placeholder" for a future recording that will occupy that slot when the class recording is done. You cannot add media to classes with placeholders because you cannot remove a future recording that is not there yet. In some cases, you can Remove (unshare/unpublish) existing media from the class if you want to replace it.
For classes that contain or will contain class captures, the presentation slot is free to receive a presentation file to go with the class media. It may be supplemental material to the class lecture or it may be a presentation you show during the class. If you need to add media or a presentation for a class that already has one, create a New Class to hold the media. Optionally, you can create a Collection to group these classes with related content together.
If the class has media (or a media placeholder) and no presentation, click the plus icon in the presentation slot to add a presentation to the class. You can select from your content library, or upload from your local computer or shared drive (such as GoogleDrive). You can also create a new presentation to add, consisting of Activity slides or Media slides only.
Manually created classes have no media until you add some. If the class has no media in it, click the blue plus icon and select whether you are adding media or a presentation.
Note that while the option says Add Video, you can add any type of playable media (audio-only, video, or pre-recorded media with dual streams).
If the class has a presentation and no media (and no placeholder for a scheduled recording), click the plus icon in the media slot to add media to the class. You can select from your content library, or upload a file from your local computer or shared drive (such as GoogleDrive).