Force Youtube to open in private window

I use Google services, but don’t want to be logged in to use Youtube by default primarily because of the current and expected future back-and-forth vis-a-vis ad blocking, i.e. I’m afraid of my Google account being locked out of Youtube for blocking ads. I found an extension that lets you specify a list of domains. Any time you open a link, bookmark or directly visit the domain it automatically opens it in a private incognito window.

Can we get this as a feature or otherwise open source extension? Not sure what this one does behind the scenes privacy-wise (regardless of what the developer declares).