RSS can be considered a federated protocol, maybe...if you stretch the definition.
With RSS, you can subscribe to feeds with any standard reader. Interestingly enough, YouTube channels all have RSS feeds, so you can subscribe to them without needing to do so via a Google account.
With RSS, you can subscribe to feeds with any standard reader. Interestingly enough, YouTube channels all have RSS feeds, so you can subscribe to them without needing to do so via a Google account.