You don’t need an Invidious instance to back FreeTube. You can set it to local mode to just talk to YouTube from your IP, or to operate through a proxy.

I wouldn’t recommend linking to it because IIRC it’s one of those web sites that can’t actually be relied on to serve the thing you linked to to the person who clicks the link. Instead it likes to serve complaints that they don’t have an account, kind of like Instagram.