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".
Enter a title for the recording and click the button for "Insert Stuff".
Select "My Media" to show your library of uploaded recordings.
Next to the recording you would like to upload, select “Embed”.
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".