You can use videos hosted Youtube and Vimeo in your course, but they need to be set up in a certain way to work in Xperiencify.
Option 1. is to set your video to completely public. Most course creators don't want to do this however as it makes your valuable videos discoverable online.
Option 2. is to set your videos to "Unlisted".
In Vimeo, here's the correct setting to use:
Your video link will be in a format like this: https://vimeo.com/295265678/8482f1684c
In Youtube, here's the correct setting to use:
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