@thebiscuit
Desktop Windows Chrome fingerprints are indeed highest quality fingerprints that Fingerprint Switcher can provide you with. Problem is that most of the traffic nowadays is mobile. Ideally, Youtube app traffic in your use case. But since this is not possible (unless you emulate the Youtube app HTTP requests), mobile browser traffic could look a bit more real.
Also I'd try to use other google services as well, as part of the warm-up process, because that's what real human users are doing, and Google/ YT knows this.