You can drag-and-drop one or multiple media files from your local file browser to anywhere in Console window to upload them.
Browse for files
If you would like to browse your computer for files to upload instead just press the "Upload" button in the top right corner of Console and then choose "Open File Browser" and you will be prompted to select files.
If you're browsing the Console in a small window such the web browser on a mobile device you will see an upload icon instead of the "Upload" button.
Record from Camera
You can also record video directly in the Console using the "Record from Camera" feature, more details can be found in this article.