Well, YouTube doesn't make it easy. The link to your feed is no longer in your YouTube channel page. But you can still get to it.
Go to your YouTube Channel page
Look at the URL, it should look something like: https://www.youtube.com/channel/UC9iWQ7qN5s62veVJAXuPNEA
See that random string after 'channel/' ? That's your YouTube Channel ID
The URL of your YouTube feed is:
https://www.youtube.com/feeds/videos.xml?channel_id=UC9iWQ7qN5s62veVJAXuPNEA
see that random string after 'channel_id=' ?. That's right, that's your channel id. Just copy and paste your channed id at the end of this url instead of the one we've shown you and you should be good to go.
A couple of large caveats here:
It's NOT RSS!! It's actually Atom, which is very much a Google-thing.
It's not even clean Atom, feedvalidator.org reported four hard errors and another five compatibility issues with the feed for my video channel above.
So, let the buyer beware.