On my Samsung:

In your settings of your phone, go to apps then find YouTube revanced.

In set as default it should give you options to view the supported web address it opens, and you can toggle them on.

Oh also, disable the built in YouTube app. Go to it's app page, then uninstall updates, then when that's finished, disable.

I'm having the same issue on my Honor. My YouTube app is disabled, I set every default link opening I could, all in vain. Very annoying.

If you are on MIUI you'll need to use the "Hidden Settings for MIUI" app.

https://play.google.com/store/apps/details?id=com.ceyhan.sets