Videos can be uploaded by selecting “Sources” and selecting “Upload Sources”.  Once the video file has completed encoding, it will appear in the Video Feed dropdown list in the Video/RTMP section.

To add a Video On Demand input click the “Feeds”  button next to your event.

Input feeds 3 and 4 can be used for on demand videos or live RTMP feeds. For these inputs accept videos, make sure the "Video" tab is selected in the Video RTMP section, then choose a video from the dropdown list. 

Finally clcik the "Set" button to add this video to the Cloudmix event.