How does it apply to Google services like Google Analytics and Youtube?

You need to ask for consent before running Google Analytics, Youtube, Adsense, Maps, Optimize.

Google Analytics collects personal data no matter how you set it up, because of their Client Id cookie (visible on the User Explorer reports) and also possible other personal data getting into the Pages and Referrers. The IP Anonymization option in Google Analytics doesn't remove all personal data, check the Network report. It will list personal names even if IP Anonymization is enabled.

Google Analytics will offer an option for visitors to be deleted through this Client Id, emphasizing that the Client Id is "personal data". It isn't possible to use Google Analytics without this Client Id.

Youtube and Google Maps embeds on your website need consent for Interest/Targeting/Advertising, since they're supported by sometimes having ads and retargeting pixels.