Why would America (US, rather) ever want to restrict their citizen's access to one of their primary propaganda drivers? If you're in America, it's already necessary to avoid youtube directly and access it via frontends like invidious if you want even slightly decent privacy and to try to avoid being sucked into youtube's personally tailored algorithm. Though you may at some point need a VPN in order to access those (the frontends) if they aren't already outlawed. I can definitely see the US banning youtube alternatives like peertube instances, further restricting any kind of oppositional content on youtube itself, and enforcing strict identity requirements to access things on the internet, but they aren't ever going to make it difficult to access their state-approved slop troughs.