Note that you must have ownership of the old recordings or they will not show up in the list of available recordings. If you don't own the lectures, please submit a request to cophelp@purdue.edu and we can help you gain access.
Log into your course in Brightspace.
Select the content tab at the top of the screen.
Click the existing activities button then select "Add Kaltura Media".
In the Add Activity popup, search for your course by name. Scroll through the results until you find the recording you would like to post then click the embed button.
Your lecture will now show up as an activity within your course.