ITS has recently set Webex to have unlimited space to prevent this storage issues. The steps below describe how to download and then permanently delete your recordings off the WebEx server if you want to remove something.
Click the Download arrow for the recordings you want to download
After you are sure you have downloaded the recordings you want to keep you need to, click the three dots in the circle at the end of the row for the recording you want to delete.
Click Delete from the resulting menu. (It will still be available in your Deleted items for 30 days, so if you goal is to free up more space continue to permanently delete it.)
Pull down the drop down menu and choose Deleted.
From the resulting screen click Delete All
Click Delete All from the resulting popup
Depending on the file format you chose, you may have to convert your file before downloading it. If you downloaded an MP4 video, you can upload that into Panopto. However, if you downloaded an ARF or WRF file, you will need to convert it to an MP4 using a coverter tool provided by Webex