You can use a rss reader app that works on the desktop like or if you want to go all out - setup something like freshrss / miniflux on a selfhosted server.

As for getting Rss feeds from Youtube. I think there are some browser extensions you can use. If you have the newpipe app on android , you can visit any Youtube channel and it will have an option to get the Rss feed on the top right. You can copy that link to your RSS reader and it will start showing new videos.