The Course Gallery is a searchable display of all media that has been assigned to a Blackboard course.
Available via Control Panel -> Course Tools -> Course Gallery, you can also add it to your Course Menu to give students access to it where they can upload their own videos pending your approval.
The Course Gallery isn’t currently named consistently.
It is referred to as either Course Gallery or Media Gallery in different parts of Blackboard
You don’t need to use the Course Gallery to upload media to your Blackboard course – you can use the mashup tool or the Kaltura content type, and students can use the mashup tool anywhere they have access to the text editor (eg blogs, wikis, etc)