There are two methods described.
Option 1
Navigate to your course in eLC.
Select "Content".
Navigate to a module.
Select "Upload/Create".
From the drop-down, select "Create a File" (even if it’s something you already created.)
Enter a title for the recording and click the small arrow button for "Insert Stuff".
Select "My Media" to show your library of uploaded recordings, which may take a few seconds to load.
Next to the recording you would like to upload, click the button for “Embed”. This may take several seconds.
Click “Insert”.
Give the item a title.
Toggle the button for “Visibility” on or off.
Select "Save and Close".
Option 2
Navigate to your course in eLC.
Select "Content".
Navigate to a module.
Select "Existing Activities".
Next to the recording you would like to upload, select “Embed”.
Select "Save and Close".