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eXo Platform uses YouTube Data API v3 that provides access to YouTube data, such as videos, playlists, and channels. To enable this, you should configure a Youtube V3 API Key property via exo.properties file.
For instance:
youtube.v3.api.key=AIzaSyDToZc6oTOpe7kZIJeSUMvxfyoS6hhKJuI
In which:
youtube.v3.api.key: an API key which is generated by a specific google account. Refer to https://console.developers.google.com to create such a key.