RSS is a great way to subscribe to various blogs, but it can be used for a lot of other things. For instance, you can get notified of new releases of any GitHub project right from your RSS feed. Here is an example:

https://github.com/rust-lang/rust/releases.atom

It’s also possible to add your favorite YouTube channels to your RSS feed. For example, here is a link to a BBC Documentary feed.

So, YouTube feed links have the following format:

https://www.youtube.com/feeds/videos.xml?channel_id=

BBC Documentary’s channel_id is UCZEPItn2Nb62Zso5eohHAAA and you can get the ID’s of your favorite channels by inspecting your address bar when they are open.